31001121332 has 24 divisors (see below), whose sum is σ = 56011522560. Its totient is φ = 14997998880.

The previous prime is 31001121331. The next prime is 31001121379. The reversal of 31001121332 is 23312110013.

It is a super-2 number, since 2×31001121332² (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 31001121332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001121331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860138 + ... + 895454.

It is an arithmetic number, because the mean of its divisors is an integer number (2333813440).

Almost surely, 2^31001121332 is an apocalyptic number.

It is an amenable number.

31001121332 is a deficient number, since it is larger than the sum of its proper divisors (25010401228).

31001121332 is a wasteful number, since it uses less digits than its factorization.

31001121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42431 (or 42429 counting only the distinct ones).

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

Adding to 31001121332 its reverse (23312110013), we get a palindrome (54313231345).

The spelling of 31001121332 in words is "thirty-one billion, one million, one hundred twenty-one thousand, three hundred thirty-two".