21323232312021 has 6 divisors (see below), whose sum is σ = 30800224450710. Its totient is φ = 14215488208008.

The previous prime is 21323232311939. The next prime is 21323232312047. The reversal of 21323232312021 is 12021323232312.

21323232312021 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 323 + 2 + 312 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17220723845796 + 4102508466225 = 4149786^2 + 2025465^2 .

It is not a de Polignac number, because 21323232312021 - 2¹³ = 21323232303829 is a prime.

It is a super-2 number, since 2×21323232312021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323232316021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184624017326 + ... + 1184624017343.

It is an arithmetic number, because the mean of its divisors is an integer number (5133370741785).

Almost surely, 2^{21323232312021} is an apocalyptic number.

It is an amenable number.

21323232312021 is a deficient number, since it is larger than the sum of its proper divisors (9476992138689).

21323232312021 is a wasteful number, since it uses less digits than its factorization.

21323232312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369248034675 (or 2369248034672 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21323232312021 its reverse (12021323232312), we get a palindrome (33344555544333).

The spelling of 21323232312021 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred thirty-two million, three hundred twelve thousand, twenty-one".