31023121032 has 24 divisors (see below), whose sum is σ = 84020952990. Its totient is φ = 10341040320.

The previous prime is 31023121021. The next prime is 31023121037. The reversal of 31023121032 is 23012132013.

31023121032 is a `hidden beast` number, since 310 + 2 + 312 + 10 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24375327876 + 6647793156 = 156126^2 + 81534^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×31023121032² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31023120996 and 31023121014.

It is not an unprimeable number, because it can be changed into a prime (31023121037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215438269 + ... + 215438412.

Almost surely, 2^31023121032 is an apocalyptic number.

It is an amenable number.

31023121032 is an abundant number, since it is smaller than the sum of its proper divisors (52997831958).

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

31023121032 is a wasteful number, since it uses less digits than its factorization.

31023121032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430876693 (or 430876686 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31023121032 its reverse (23012132013), we get a palindrome (54035253045).

The spelling of 31023121032 in words is "thirty-one billion, twenty-three million, one hundred twenty-one thousand, thirty-two".