31031021132 has 12 divisors (see below), whose sum is σ = 54305521536. Its totient is φ = 15515157840.

The previous prime is 31031021117. The next prime is 31031021143. The reversal of 31031021132 is 23112013013.

It is a super-2 number, since 2×31031021132² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31031021132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289382 + ... + 381842.

It is an arithmetic number, because the mean of its divisors is an integer number (4525460128).

Almost surely, 2^31031021132 is an apocalyptic number.

It is an amenable number.

31031021132 is a deficient number, since it is larger than the sum of its proper divisors (23274500404).

31031021132 is a wasteful number, since it uses less digits than its factorization.

31031021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176368 (or 176366 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31031021132 its reverse (23112013013), we get a palindrome (54143034145).

The spelling of 31031021132 in words is "thirty-one billion, thirty-one million, twenty-one thousand, one hundred thirty-two".