31121253132 has 24 divisors (see below), whose sum is σ = 72654997296. Its totient is φ = 10368216768.

The previous prime is 31121253109. The next prime is 31121253161. The reversal of 31121253132 is 23135212113.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 668323 + ... + 713370.

It is an arithmetic number, because the mean of its divisors is an integer number (3027291554).

Almost surely, 2^31121253132 is an apocalyptic number.

It is an amenable number.

31121253132 is an abundant number, since it is smaller than the sum of its proper divisors (41533744164).

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

31121253132 is a wasteful number, since it uses less digits than its factorization.

31121253132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383577 (or 1383575 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

Adding to 31121253132 its reverse (23135212113), we get a palindrome (54256465245).

The spelling of 31121253132 in words is "thirty-one billion, one hundred twenty-one million, two hundred fifty-three thousand, one hundred thirty-two".