31212331313123 has 4 divisors (see below), whose sum is σ = 31212686243928. Its totient is φ = 31211976382320.

The previous prime is 31212331313113. The next prime is 31212331313129. The reversal of 31212331313123 is 32131313321213.

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

It is a cyclic number.

It is not a de Polignac number, because 31212331313123 - 2⁸ = 31212331312867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212331313129) 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, 177333461 + ... + 177509382.

It is an arithmetic number, because the mean of its divisors is an integer number (7803171560982).

Almost surely, 2^{31212331313123} is an apocalyptic number.

31212331313123 is a deficient number, since it is larger than the sum of its proper divisors (354930805).

31212331313123 is an equidigital number, since it uses as much as digits as its factorization.

31212331313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354930804.

The product of its digits is 5832, while the sum is 29.

Adding to 31212331313123 its reverse (32131313321213), we get a palindrome (63343644634336).

The spelling of 31212331313123 in words is "thirty-one trillion, two hundred twelve billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred twenty-three".