2313221000021 has 4 divisors (see below), whose sum is σ = 2328540344544. Its totient is φ = 2297901655500.

The previous prime is 2313221000003. The next prime is 2313221000039. The reversal of 2313221000021 is 1200001223132.

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 an interprime number because it is at equal distance from previous prime (2313221000003) and next prime (2313221000039).

It is a cyclic number.

It is not a de Polignac number, because 2313221000021 - 2²⁶ = 2313153891157 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 (2313221000081) 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, 7659672035 + ... + 7659672336.

It is an arithmetic number, because the mean of its divisors is an integer number (582135086136).

Almost surely, 2^{2313221000021} is an apocalyptic number.

It is an amenable number.

2313221000021 is a deficient number, since it is larger than the sum of its proper divisors (15319344523).

2313221000021 is a wasteful number, since it uses less digits than its factorization.

2313221000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15319344522.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2313221000021 its reverse (1200001223132), we get a palindrome (3513222223153).

The spelling of 2313221000021 in words is "two trillion, three hundred thirteen billion, two hundred twenty-one million, twenty-one", and thus it is an aban number.