31133313321 has 16 divisors (see below), whose sum is σ = 45751677888. Its totient is φ = 18674150400.

The previous prime is 31133313319. The next prime is 31133313331. The reversal of 31133313321 is 12331333113.

It is not a de Polignac number, because 31133313321 - 2¹ = 31133313319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31133313291 and 31133313300.

It is not an unprimeable number, because it can be changed into a prime (31133313331) 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, 4859860 + ... + 4866261.

It is an arithmetic number, because the mean of its divisors is an integer number (2859479868).

Almost surely, 2^31133313321 is an apocalyptic number.

It is an amenable number.

31133313321 is a deficient number, since it is larger than the sum of its proper divisors (14618364567).

31133313321 is a wasteful number, since it uses less digits than its factorization.

31133313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9726232.

The product of its digits is 1458, while the sum is 24.

Adding to 31133313321 its reverse (12331333113), we get a palindrome (43464646434).

The spelling of 31133313321 in words is "thirty-one billion, one hundred thirty-three million, three hundred thirteen thousand, three hundred twenty-one".