31321011313133 has 4 divisors (see below), whose sum is σ = 32682794413728. Its totient is φ = 29959228212540.

The previous prime is 31321011313127. The next prime is 31321011313147. The reversal of 31321011313133 is 33131311012313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31321011313133 - 2²² = 31321007118829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321011313153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680891550263 + ... + 680891550308.

It is an arithmetic number, because the mean of its divisors is an integer number (8170698603432).

Almost surely, 2^{31321011313133} is an apocalyptic number.

It is an amenable number.

31321011313133 is a deficient number, since it is larger than the sum of its proper divisors (1361783100595).

31321011313133 is a wasteful number, since it uses less digits than its factorization.

31321011313133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361783100594.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 31321011313133 its reverse (33131311012313), we get a palindrome (64452322325446).

The spelling of 31321011313133 in words is "thirty-one trillion, three hundred twenty-one billion, eleven million, three hundred thirteen thousand, one hundred thirty-three".