21132032223 has 16 divisors (see below), whose sum is σ = 29885746176. Its totient is φ = 13236074880.

The previous prime is 21132032219. The next prime is 21132032263. The reversal of 21132032223 is 32223023112.

It is a happy number.

It is not a de Polignac number, because 21132032223 - 2² = 21132032219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21132032223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132032263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333711 + ... + 391952.

It is an arithmetic number, because the mean of its divisors is an integer number (1867859136).

Almost surely, 2^21132032223 is an apocalyptic number.

21132032223 is a deficient number, since it is larger than the sum of its proper divisors (8753713953).

21132032223 is a wasteful number, since it uses less digits than its factorization.

21132032223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726254.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21132032223 its reverse (32223023112), we get a palindrome (53355055335).

The spelling of 21132032223 in words is "twenty-one billion, one hundred thirty-two million, thirty-two thousand, two hundred twenty-three".