3121123131 has 16 divisors (see below), whose sum is σ = 5284441600. Its totient is φ = 1783498824.

The previous prime is 3121123127. The next prime is 3121123147. The reversal of 3121123131 is 1313211213.

3121123131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3121123131 - 2² = 3121123127 is a prime.

It is a super-2 number, since 2×3121123131² = 19482819197726486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121123631) 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, 8256751 + ... + 8257128.

It is an arithmetic number, because the mean of its divisors is an integer number (330277600).

Almost surely, 2^3121123131 is an apocalyptic number.

3121123131 is a deficient number, since it is larger than the sum of its proper divisors (2163318469).

3121123131 is a wasteful number, since it uses less digits than its factorization.

3121123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16513895 (or 16513889 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 3121123131 is about 55867.0129056494. The cubic root of 3121123131 is about 1461.4040304516.

Adding to 3121123131 its reverse (1313211213), we get a palindrome (4434334344).

The spelling of 3121123131 in words is "three billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty-one".