3131100120 has 64 divisors (see below), whose sum is σ = 9945853920. Its totient is φ = 785844224.

The previous prime is 3131100113. The next prime is 3131100121. The reversal of 3131100120 is 210011313.

3131100120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3131100120² = 19607575922928028800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 3131100096 and 3131100105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131100121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765387 + ... + 769466.

Almost surely, 2^3131100120 is an apocalyptic number.

3131100120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131100120 is an abundant number, since it is smaller than the sum of its proper divisors (6814753800).

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

3131100120 is a wasteful number, since it uses less digits than its factorization.

3131100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534884 (or 1534880 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 3131100120 is about 55956.2339690584. The cubic root of 3131100120 is about 1462.9595499372.

Adding to 3131100120 its reverse (210011313), we get a palindrome (3341111433).

The spelling of 3131100120 in words is "three billion, one hundred thirty-one million, one hundred thousand, one hundred twenty".