323131220113221 has 24 divisors (see below), whose sum is σ = 502717355955360. Its totient is φ = 198822767453856.

The previous prime is 323131220113201. The next prime is 323131220113267. The reversal of 323131220113221 is 122311022131323.

323131220113221 is a `hidden beast` number, since 3 + 2 + 3 + 1 + 312 + 20 + 1 + 1 + 322 + 1 = 666.

It is not a de Polignac number, because 323131220113221 - 2⁵ = 323131220113189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323131220113201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188128611 + ... + 189838448.

It is an arithmetic number, because the mean of its divisors is an integer number (20946556498140).

Almost surely, 2^{323131220113221} is an apocalyptic number.

It is an amenable number.

323131220113221 is a deficient number, since it is larger than the sum of its proper divisors (179586135842139).

323131220113221 is a wasteful number, since it uses less digits than its factorization.

323131220113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377974385 (or 377974382 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 323131220113221 its reverse (122311022131323), we get a palindrome (445442242244544).

It can be divided in two parts, 323131220 and 113221, that added together give a square (323244441 = 17979²).

The spelling of 323131220113221 in words is "three hundred twenty-three trillion, one hundred thirty-one billion, two hundred twenty million, one hundred thirteen thousand, two hundred twenty-one".