21232120023131 has 4 divisors (see below), whose sum is σ = 21233335596792. Its totient is φ = 21230904449472.

The previous prime is 21232120023119. The next prime is 21232120023139. The reversal of 21232120023131 is 13132002123212.

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 21232120023131 - 2¹⁰ = 21232120022107 is a prime.

It is a super-2 number, since 2×21232120023131² (a number of 27 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 = 21232120023097 and 21232120023106.

It is not an unprimeable number, because it can be changed into a prime (21232120023139) 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, 607760630 + ... + 607795563.

It is an arithmetic number, because the mean of its divisors is an integer number (5308333899198).

Almost surely, 2^{21232120023131} is an apocalyptic number.

21232120023131 is a deficient number, since it is larger than the sum of its proper divisors (1215573661).

21232120023131 is a wasteful number, since it uses less digits than its factorization.

21232120023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215573660.

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

Adding to 21232120023131 its reverse (13132002123212), we get a palindrome (34364122146343).

The spelling of 21232120023131 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, twenty-three thousand, one hundred thirty-one".