102020311312 has 20 divisors (see below), whose sum is σ = 197670831516. Its totient is φ = 51008483840.

The previous prime is 102020311231. The next prime is 102020311343. The reversal of 102020311312 is 213113020201.

It can be written as a sum of positive squares in 2 ways, for example, as 47682836496 + 54337474816 = 218364^2 + 233104^2 .

It is a super-2 number, since 2×102020311312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507612 + ... + 679492.

Almost surely, 2^102020311312 is an apocalyptic number.

It is an amenable number.

102020311312 is a deficient number, since it is larger than the sum of its proper divisors (95650520204).

102020311312 is a wasteful number, since it uses less digits than its factorization.

102020311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208986 (or 208980 counting only the distinct ones).

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

Adding to 102020311312 its reverse (213113020201), we get a palindrome (315133331513).

The spelling of 102020311312 in words is "one hundred two billion, twenty million, three hundred eleven thousand, three hundred twelve".