21132310223 has 4 divisors (see below), whose sum is σ = 21134309400. Its totient is φ = 21130311048.

The previous prime is 21132310217. The next prime is 21132310267. The reversal of 21132310223 is 32201323112.

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 21132310223 - 2¹⁶ = 21132244687 is a prime.

It is a super-2 number, since 2×21132310223² (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 = 21132310195 and 21132310204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132310123) 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, 983648 + ... + 1004901.

It is an arithmetic number, because the mean of its divisors is an integer number (5283577350).

Almost surely, 2^21132310223 is an apocalyptic number.

21132310223 is a deficient number, since it is larger than the sum of its proper divisors (1999177).

21132310223 is a wasteful number, since it uses less digits than its factorization.

21132310223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999176.

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

Adding to 21132310223 its reverse (32201323112), we get a palindrome (53333633335).

The spelling of 21132310223 in words is "twenty-one billion, one hundred thirty-two million, three hundred ten thousand, two hundred twenty-three".