31033013121 has 12 divisors (see below), whose sum is σ = 48900505680. Its totient is φ = 18807886680.

The previous prime is 31033013057. The next prime is 31033013159. The reversal of 31033013121 is 12131033013.

It is a happy number.

31033013121 is a `hidden beast` number, since 310 + 3 + 301 + 31 + 21 = 666.

It is not a de Polignac number, because 31033013121 - 2⁶ = 31033013057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31033013094 and 31033013103.

It is not an unprimeable number, because it can be changed into a prime (31033013161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156732291 + ... + 156732488.

It is an arithmetic number, because the mean of its divisors is an integer number (4075042140).

Almost surely, 2^31033013121 is an apocalyptic number.

It is an amenable number.

31033013121 is a deficient number, since it is larger than the sum of its proper divisors (17867492559).

31033013121 is a wasteful number, since it uses less digits than its factorization.

31033013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313464796 (or 313464793 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31033013121 its reverse (12131033013), we get a palindrome (43164046134).

It can be divided in two parts, 31033013 and 121, that multiplied together give a palindrome (3754994573).

The spelling of 31033013121 in words is "thirty-one billion, thirty-three million, thirteen thousand, one hundred twenty-one".