2313221331221 has 16 divisors (see below), whose sum is σ = 2460123477504. Its totient is φ = 2167539024384.

The previous prime is 2313221331203. The next prime is 2313221331319. The reversal of 2313221331221 is 1221331223132.

It is not a de Polignac number, because 2313221331221 - 2³⁰ = 2312147589397 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 (2313221330221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4247201 + ... + 4760793.

It is an arithmetic number, because the mean of its divisors is an integer number (153757717344).

Almost surely, 2^{2313221331221} is an apocalyptic number.

It is an amenable number.

2313221331221 is a deficient number, since it is larger than the sum of its proper divisors (146902146283).

2313221331221 is a wasteful number, since it uses less digits than its factorization.

2313221331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514780.

The product of its digits is 2592, while the sum is 26.

Adding to 2313221331221 its reverse (1221331223132), we get a palindrome (3534552554353).

The spelling of 2313221331221 in words is "two trillion, three hundred thirteen billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-one".