21130232323 has 4 divisors (see below), whose sum is σ = 21130608600. Its totient is φ = 21129856048.

The previous prime is 21130232309. The next prime is 21130232377. The reversal of 21130232323 is 32323203112.

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 21130232323 - 2²⁵ = 21096677891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130232294 and 21130232303.

It is not an unprimeable number, because it can be changed into a prime (21130232303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85090 + ... + 222487.

It is an arithmetic number, because the mean of its divisors is an integer number (5282652150).

Almost surely, 2^21130232323 is an apocalyptic number.

21130232323 is a deficient number, since it is larger than the sum of its proper divisors (376277).

21130232323 is an equidigital number, since it uses as much as digits as its factorization.

21130232323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376276.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21130232323 its reverse (32323203112), we get a palindrome (53453435435).

The spelling of 21130232323 in words is "twenty-one billion, one hundred thirty million, two hundred thirty-two thousand, three hundred twenty-three".