31311132321311 has 8 divisors (see below), whose sum is σ = 31314373175040. Its totient is φ = 31307891670432.

The previous prime is 31311132321263. The next prime is 31311132321419. The reversal of 31311132321311 is 11312323111313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311132321311 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 (31311137321311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732008921 + ... + 732051693.

It is an arithmetic number, because the mean of its divisors is an integer number (3914296646880).

Almost surely, 2^{31311132321311} is an apocalyptic number.

31311132321311 is a deficient number, since it is larger than the sum of its proper divisors (3240853729).

31311132321311 is a wasteful number, since it uses less digits than its factorization.

31311132321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101425.

The product of its digits is 972, while the sum is 26.

Adding to 31311132321311 its reverse (11312323111313), we get a palindrome (42623455432624).

The spelling of 31311132321311 in words is "thirty-one trillion, three hundred eleven billion, one hundred thirty-two million, three hundred twenty-one thousand, three hundred eleven".