311020120 has 32 divisors (see below), whose sum is σ = 736628400. Its totient is φ = 117859968.

The previous prime is 311020109. The next prime is 311020141. The reversal of 311020120 is 21020113.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 311020097 and 311020106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203859 + ... + 205378.

Almost surely, 2^311020120 is an apocalyptic number.

It is an amenable number.

311020120 is an abundant number, since it is smaller than the sum of its proper divisors (425608280).

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

311020120 is a wasteful number, since it uses less digits than its factorization.

311020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409267 (or 409263 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 311020120 is about 17635.7625295874. The cubic root of 311020120 is about 677.5315054588.

Adding to 311020120 its reverse (21020113), we get a palindrome (332040233).

The spelling of 311020120 in words is "three hundred eleven million, twenty thousand, one hundred twenty".