31133013321 has 16 divisors (see below), whose sum is σ = 41679100800. Its totient is φ = 20671187328.

The previous prime is 31133013271. The next prime is 31133013323. The reversal of 31133013321 is 12331033113.

It is not a de Polignac number, because 31133013321 - 2²¹ = 31130916169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31133013323) 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 15 ways as a sum of consecutive naturals, for example, 3642565 + ... + 3651101.

It is an arithmetic number, because the mean of its divisors is an integer number (2604943800).

Almost surely, 2^31133013321 is an apocalyptic number.

It is an amenable number.

31133013321 is a deficient number, since it is larger than the sum of its proper divisors (10546087479).

31133013321 is a wasteful number, since it uses less digits than its factorization.

31133013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13328.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31133013321 its reverse (12331033113), we get a palindrome (43464046434).

The spelling of 31133013321 in words is "thirty-one billion, one hundred thirty-three million, thirteen thousand, three hundred twenty-one".