21320022330311 has 4 divisors (see below), whose sum is σ = 21320056662672. Its totient is φ = 21319987997952.

The previous prime is 21320022330263. The next prime is 21320022330323. The reversal of 21320022330311 is 11303322002312.

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

It is a cyclic number.

It is not a de Polignac number, because 21320022330311 - 2⁶ = 21320022330247 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 (21320022330331) 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, 16217210 + ... + 17482503.

It is an arithmetic number, because the mean of its divisors is an integer number (5330014165668).

Almost surely, 2^{21320022330311} is an apocalyptic number.

21320022330311 is a deficient number, since it is larger than the sum of its proper divisors (34332361).

21320022330311 is an equidigital number, since it uses as much as digits as its factorization.

21320022330311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34332360.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21320022330311 its reverse (11303322002312), we get a palindrome (32623344332623).

The spelling of 21320022330311 in words is "twenty-one trillion, three hundred twenty billion, twenty-two million, three hundred thirty thousand, three hundred eleven".