21312210300023 has 16 divisors (see below), whose sum is σ = 21527169148800. Its totient is φ = 21098218949280.

The previous prime is 21312210300001. The next prime is 21312210300067. The reversal of 21312210300023 is 32000301221312.

It is a cyclic number.

It is not a de Polignac number, because 21312210300023 - 2²⁰ = 21312209251447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312210299968 and 21312210300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312210300223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67741640 + ... + 68055522.

It is an arithmetic number, because the mean of its divisors is an integer number (1345448071800).

Almost surely, 2^{21312210300023} is an apocalyptic number.

21312210300023 is a deficient number, since it is larger than the sum of its proper divisors (214958848777).

21312210300023 is a wasteful number, since it uses less digits than its factorization.

21312210300023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315422.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21312210300023 its reverse (32000301221312), we get a palindrome (53312511521335).

The spelling of 21312210300023 in words is "twenty-one trillion, three hundred twelve billion, two hundred ten million, three hundred thousand, twenty-three".