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20121103113020 = 22571311055551161
BaseRepresentation
bin1001001001100110011110…
…01101000001101100111100
32122020120002021100001201222
410210303033031001230330
510114131004344104040
6110443301314052512
74144462456344140
oct444631715015474
978216067301658
1020121103113020
116458348173308
12230b73087a138
13b2c547b9b9b0
144d7c1bcb3220
1524d5e1ad9bb5
hex124ccf341b3c

20121103113020 has 48 divisors (see below), whose sum is σ = 52005312666048. Its totient is φ = 6367997468160.

The previous prime is 20121103112947. The next prime is 20121103113037. The reversal of 20121103113020 is 2031130112102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121103113020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5527773761 + ... + 5527777400.

It is an arithmetic number, because the mean of its divisors is an integer number (1083444013876).

Almost surely, 220121103113020 is an apocalyptic number.

20121103113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121103113020 is an abundant number, since it is smaller than the sum of its proper divisors (31884209553028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121103113020 is a wasteful number, since it uses less digits than its factorization.

20121103113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055551190 (or 11055551188 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20121103113020 its reverse (2031130112102), we get a palindrome (22152233225122).

The spelling of 20121103113020 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, one hundred thirteen thousand, twenty".

Divisors: 1 2 4 5 7 10 13 14 20 26 28 35 52 65 70 91 130 140 182 260 364 455 910 1820 11055551161 22111102322 44222204644 55277755805 77388858127 110555511610 143722165093 154777716254 221111023220 287444330186 309555432508 386944290635 574888660372 718610825465 773888581270 1006055155651 1437221650930 1547777162540 2012110311302 2874443301860 4024220622604 5030275778255 10060551556510 20121103113020