31231223033201 has 4 divisors (see below), whose sum is σ = 31820491392372. Its totient is φ = 30641954674032.

The previous prime is 31231223033123. The next prime is 31231223033251. The reversal of 31231223033201 is 10233032213213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22355733394225 + 8875489638976 = 4728185^2 + 2979176^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231223033201 - 2²⁶ = 31231155924337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231223033251) 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, 294634179506 + ... + 294634179611.

It is an arithmetic number, because the mean of its divisors is an integer number (7955122848093).

Almost surely, 2^{31231223033201} is an apocalyptic number.

It is an amenable number.

31231223033201 is a deficient number, since it is larger than the sum of its proper divisors (589268359171).

31231223033201 is an equidigital number, since it uses as much as digits as its factorization.

31231223033201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589268359170.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31231223033201 its reverse (10233032213213), we get a palindrome (41464255246414).

The spelling of 31231223033201 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred twenty-three million, thirty-three thousand, two hundred one".