31313223211201 has 4 divisors (see below), whose sum is σ = 31314543409600. Its totient is φ = 31311903012804.

The previous prime is 31313223211187. The next prime is 31313223211229. The reversal of 31313223211201 is 10211232231313.

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 a de Polignac number, because none of the positive numbers 2^k-31313223211201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313223211271) 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, 660063621 + ... + 660111058.

It is an arithmetic number, because the mean of its divisors is an integer number (7828635852400).

Almost surely, 2^{31313223211201} is an apocalyptic number.

It is an amenable number.

31313223211201 is a deficient number, since it is larger than the sum of its proper divisors (1320198399).

31313223211201 is a wasteful number, since it uses less digits than its factorization.

31313223211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320198398.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31313223211201 its reverse (10211232231313), we get a palindrome (41524455442514).

The spelling of 31313223211201 in words is "thirty-one trillion, three hundred thirteen billion, two hundred twenty-three million, two hundred eleven thousand, two hundred one".