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1212210111020 = 225257235838543
BaseRepresentation
bin10001101000111101010…
…110100110001000101100
311021212221000012000110112
4101220331112212020230
5124330101242023040
62324514233355152
7153402460635236
oct21507526461054
94255830160415
101212210111020
11428106007237
12176b26868ab8
138a407136a7c
1442957ddb256
15217ebb11365
hex11a3d5a622c

1212210111020 has 24 divisors (see below), whose sum is σ = 2555546462784. Its totient is φ = 482997334016.

The previous prime is 1212210111019. The next prime is 1212210111067. The reversal of 1212210111020 is 201110122121.

It is a junction number, because it is equal to n+sod(n) for n = 1212210110986 and 1212210111004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117914132 + ... + 117924411.

It is an arithmetic number, because the mean of its divisors is an integer number (106481102616).

Almost surely, 21212210111020 is an apocalyptic number.

1212210111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210111020 is an abundant number, since it is smaller than the sum of its proper divisors (1343336351764).

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

1212210111020 is a wasteful number, since it uses less digits than its factorization.

1212210111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235838809 (or 235838807 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212210111020 its reverse (201110122121), we get a palindrome (1413320233141).

It can be divided in two parts, 12122101 and 11020, that added together give a palindrome (12133121).

The spelling of 1212210111020 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred eleven thousand, twenty".

Divisors: 1 2 4 5 10 20 257 514 1028 1285 2570 5140 235838543 471677086 943354172 1179192715 2358385430 4716770860 60610505551 121221011102 242442022204 303052527755 606105055510 1212210111020