21312132222023 has 4 divisors (see below), whose sum is σ = 21312898790568. Its totient is φ = 21311365653480.

The previous prime is 21312132222011. The next prime is 21312132222049. The reversal of 21312132222023 is 32022223121312.

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 21312132222023 - 2⁸ = 21312132221767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312132221983 and 21312132222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312132222083) 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, 383242568 + ... + 383298173.

It is an arithmetic number, because the mean of its divisors is an integer number (5328224697642).

Almost surely, 2^{21312132222023} is an apocalyptic number.

21312132222023 is a deficient number, since it is larger than the sum of its proper divisors (766568545).

21312132222023 is an equidigital number, since it uses as much as digits as its factorization.

21312132222023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766568544.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21312132222023 its reverse (32022223121312), we get a palindrome (53334355343335).

The spelling of 21312132222023 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-two million, two hundred twenty-two thousand, twenty-three".