311032102120 has 32 divisors (see below), whose sum is σ = 711294730920. Its totient is φ = 122373285120.

The previous prime is 311032102097. The next prime is 311032102123. The reversal of 311032102120 is 21201230113.

It can be written as a sum of positive squares in 4 ways, for example, as 104030761444 + 207001340676 = 322538^2 + 454974^2 .

It is a super-2 number, since 2×311032102120² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311032102094 and 311032102103.

It is not an unprimeable number, because it can be changed into a prime (311032102123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63733647 + ... + 63738526.

Almost surely, 2^311032102120 is an apocalyptic number.

It is an amenable number.

311032102120 is an abundant number, since it is smaller than the sum of its proper divisors (400262628800).

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

311032102120 is a wasteful number, since it uses less digits than its factorization.

311032102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127472245 (or 127472241 counting only the distinct ones).

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

Adding to 311032102120 its reverse (21201230113), we get a palindrome (332233332233).

The spelling of 311032102120 in words is "three hundred eleven billion, thirty-two million, one hundred two thousand, one hundred twenty".