31321122292 has 12 divisors (see below), whose sum is σ = 56148841476. Its totient is φ = 15278596160.

The previous prime is 31321122253. The next prime is 31321122293. The reversal of 31321122292 is 29222112313.

It can be written as a sum of positive squares in 2 ways, for example, as 15325449616 + 15995672676 = 123796^2 + 126474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31321122292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321122293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95491063 + ... + 95491390.

It is an arithmetic number, because the mean of its divisors is an integer number (4679070123).

Almost surely, 2^31321122292 is an apocalyptic number.

It is an amenable number.

31321122292 is a deficient number, since it is larger than the sum of its proper divisors (24827719184).

31321122292 is a wasteful number, since it uses less digits than its factorization.

31321122292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190982498 (or 190982496 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The spelling of 31321122292 in words is "thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred ninety-two".