31122131133 has 16 divisors (see below), whose sum is σ = 42033024000. Its totient is φ = 20479807920.

The previous prime is 31122131083. The next prime is 31122131171. The reversal of 31122131133 is 33113122113.

It is a happy number.

It is not a de Polignac number, because 31122131133 - 2⁶ = 31122131069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122131533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953518 + ... + 985616.

It is an arithmetic number, because the mean of its divisors is an integer number (2627064000).

Almost surely, 2^31122131133 is an apocalyptic number.

It is an amenable number.

31122131133 is a deficient number, since it is larger than the sum of its proper divisors (10910892867).

31122131133 is a wasteful number, since it uses less digits than its factorization.

31122131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36272.

The product of its digits is 324, while the sum is 21.

Adding to 31122131133 its reverse (33113122113), we get a palindrome (64235253246).

The spelling of 31122131133 in words is "thirty-one billion, one hundred twenty-two million, one hundred thirty-one thousand, one hundred thirty-three".