21023264131 has 8 divisors (see below), whose sum is σ = 21072506400. Its totient is φ = 20974070208.

The previous prime is 21023264113. The next prime is 21023264161. The reversal of 21023264131 is 13146232012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21023264131 - 2²¹ = 21021166979 is a prime.

It is a super-2 number, since 2×21023264131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023264096 and 21023264105.

It is not an unprimeable number, because it can be changed into a prime (21023264161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945615 + ... + 967591.

It is an arithmetic number, because the mean of its divisors is an integer number (2634063300).

Almost surely, 2^21023264131 is an apocalyptic number.

21023264131 is a deficient number, since it is larger than the sum of its proper divisors (49242269).

21023264131 is a wasteful number, since it uses less digits than its factorization.

21023264131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24173.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21023264131 its reverse (13146232012), we get a palindrome (34169496143).

The spelling of 21023264131 in words is "twenty-one billion, twenty-three million, two hundred sixty-four thousand, one hundred thirty-one".