31211322133 has 12 divisors (see below), whose sum is σ = 32631328128. Its totient is φ = 29821984920.

The previous prime is 31211322113. The next prime is 31211322137. The reversal of 31211322133 is 33122311213.

It is not a de Polignac number, because 31211322133 - 2²⁵ = 31177767701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211322137) 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 11 ways as a sum of consecutive naturals, for example, 112810 + ... + 274132.

It is an arithmetic number, because the mean of its divisors is an integer number (2719277344).

Almost surely, 2^31211322133 is an apocalyptic number.

It is an amenable number.

31211322133 is a deficient number, since it is larger than the sum of its proper divisors (1420005995).

31211322133 is an equidigital number, since it uses as much as digits as its factorization.

31211322133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161512 (or 161433 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 31211322133 its reverse (33122311213), we get a palindrome (64333633346).

The spelling of 31211322133 in words is "thirty-one billion, two hundred eleven million, three hundred twenty-two thousand, one hundred thirty-three".