31303121330 has 24 divisors (see below), whose sum is σ = 61013306052. Its totient is φ = 11558074944.

The previous prime is 31303121323. The next prime is 31303121347. The reversal of 31303121330 is 3312130313.

It can be written as a sum of positive squares in 6 ways, for example, as 127215841 + 31175905489 = 11279^2 + 176567^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9259589 + ... + 9262968.

Almost surely, 2^31303121330 is an apocalyptic number.

31303121330 is a deficient number, since it is larger than the sum of its proper divisors (29710184722).

31303121330 is a wasteful number, since it uses less digits than its factorization.

31303121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18522590 (or 18522577 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31303121330 its reverse (3312130313), we get a palindrome (34615251643).

The spelling of 31303121330 in words is "thirty-one billion, three hundred three million, one hundred twenty-one thousand, three hundred thirty".