21222311001323 has 4 divisors (see below), whose sum is σ = 21239981536248. Its totient is φ = 21204640466400.

The previous prime is 21222311001313. The next prime is 21222311001343. The reversal of 21222311001323 is 32310011322212.

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 21222311001323 - 2³⁴ = 21205131132139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222311001313) 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, 8835265661 + ... + 8835268062.

It is an arithmetic number, because the mean of its divisors is an integer number (5309995384062).

Almost surely, 2^{21222311001323} is an apocalyptic number.

21222311001323 is a deficient number, since it is larger than the sum of its proper divisors (17670534925).

21222311001323 is a wasteful number, since it uses less digits than its factorization.

21222311001323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17670534924.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21222311001323 its reverse (32310011322212), we get a palindrome (53532322323535).

The spelling of 21222311001323 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred eleven million, one thousand, three hundred twenty-three".