3121956912 has 40 divisors (see below), whose sum is σ = 8067997504. Its totient is φ = 1040272704.

The previous prime is 3121956889. The next prime is 3121956913. The reversal of 3121956912 is 2196591213.

It is a super-2 number, since 2×3121956912² = 19493229920769151488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3121956913) 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, 141543 + ... + 162105.

Almost surely, 2^3121956912 is an apocalyptic number.

It is an amenable number.

3121956912 is an abundant number, since it is smaller than the sum of its proper divisors (4946040592).

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

3121956912 is a wasteful number, since it uses less digits than its factorization.

3121956912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23737 (or 23731 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 3121956912 is about 55874.4746015567. The cubic root of 3121956912 is about 1461.5341526731.

The spelling of 3121956912 in words is "three billion, one hundred twenty-one million, nine hundred fifty-six thousand, nine hundred twelve".