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321213011020 = 225112934983137
BaseRepresentation
bin1001010110010011100…
…10011001010001001100
31010201002212221122021221
410223021302121101030
520230321012323040
6403321353333124
732130646354456
oct4531162312114
91121085848257
10321213011020
11114253409470
12523057071a4
13243a0904c35
14117925832d6
15854eb8574a
hex4ac9c9944c

321213011020 has 48 divisors (see below), whose sum is σ = 738381456288. Its totient is φ = 116406056960.

The previous prime is 321213010957. The next prime is 321213011029. The reversal of 321213011020 is 20110312123.

It is a junction number, because it is equal to n+sod(n) for n = 321213010985 and 321213011003.

It is not an unprimeable number, because it can be changed into a prime (321213011029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2427109 + ... + 2556028.

It is an arithmetic number, because the mean of its divisors is an integer number (15382947006).

Almost surely, 2321213011020 is an apocalyptic number.

It is an amenable number.

321213011020 is an abundant number, since it is smaller than the sum of its proper divisors (417168445268).

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

321213011020 is a wasteful number, since it uses less digits than its factorization.

321213011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983450 (or 4983448 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 321213011020 its reverse (20110312123), we get a palindrome (341323323143).

The spelling of 321213011020 in words is "three hundred twenty-one billion, two hundred thirteen million, eleven thousand, twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 293 586 1172 1465 2930 3223 5860 6446 12892 16115 32230 64460 4983137 9966274 19932548 24915685 49831370 54814507 99662740 109629014 219258028 274072535 548145070 1096290140 1460059141 2920118282 5840236564 7300295705 14600591410 16060650551 29201182820 32121301102 64242602204 80303252755 160606505510 321213011020