31321332133123 has 4 divisors (see below), whose sum is σ = 31321441777528. Its totient is φ = 31321222488720.

The previous prime is 31321332133061. The next prime is 31321332133129. The reversal of 31321332133123 is 32133123312313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321332133123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321332133129) 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 3 ways as a sum of consecutive naturals, for example, 54392586 + ... + 54965407.

It is an arithmetic number, because the mean of its divisors is an integer number (7830360444382).

Almost surely, 2^{31321332133123} is an apocalyptic number.

31321332133123 is a deficient number, since it is larger than the sum of its proper divisors (109644405).

31321332133123 is a wasteful number, since it uses less digits than its factorization.

31321332133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109644404.

The product of its digits is 17496, while the sum is 31.

Adding to 31321332133123 its reverse (32133123312313), we get a palindrome (63454455445436).

The spelling of 31321332133123 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred thirty-two million, one hundred thirty-three thousand, one hundred twenty-three".