31032113121 has 16 divisors (see below), whose sum is σ = 46752715200. Its totient is φ = 20337429024.

The previous prime is 31032113113. The next prime is 31032113137. The reversal of 31032113121 is 12131123013.

31032113121 is a `hidden beast` number, since 31 + 0 + 321 + 1 + 312 + 1 = 666.

It is not a de Polignac number, because 31032113121 - 2³ = 31032113113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31032113094 and 31032113103.

It is not an unprimeable number, because it can be changed into a prime (31032113141) 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, 9738556 + ... + 9741741.

It is an arithmetic number, because the mean of its divisors is an integer number (2922044700).

Almost surely, 2^31032113121 is an apocalyptic number.

It is an amenable number.

31032113121 is a deficient number, since it is larger than the sum of its proper divisors (15720602079).

31032113121 is a wasteful number, since it uses less digits than its factorization.

31032113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19480365 (or 19480359 counting only the distinct ones).

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

Adding to 31032113121 its reverse (12131123013), we get a palindrome (43163236134).

The spelling of 31032113121 in words is "thirty-one billion, thirty-two million, one hundred thirteen thousand, one hundred twenty-one".