31121231330 has 96 divisors (see below), whose sum is σ = 66295786176. Its totient is φ = 10485611136.

The previous prime is 31121231329. The next prime is 31121231341. The reversal of 31121231330 is 3313212113.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17957144 + ... + 17958876.

It is an arithmetic number, because the mean of its divisors is an integer number (690581106).

Almost surely, 2^31121231330 is an apocalyptic number.

31121231330 is an abundant number, since it is smaller than the sum of its proper divisors (35174554846).

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

31121231330 is a wasteful number, since it uses less digits than its factorization.

31121231330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31121231330 its reverse (3313212113), we get a palindrome (34434443443).

The spelling of 31121231330 in words is "thirty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred thirty".