21132222404 has 24 divisors (see below), whose sum is σ = 37522867200. Its totient is φ = 10412521056.

The previous prime is 21132222401. The next prime is 21132222407. The reversal of 21132222404 is 40422223112.

It is an interprime number because it is at equal distance from previous prime (21132222401) and next prime (21132222407).

It is a self number, because there is not a number n which added to its sum of digits gives 21132222404.

It is not an unprimeable number, because it can be changed into a prime (21132222401) 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, 63902 + ... + 215285.

It is an arithmetic number, because the mean of its divisors is an integer number (1563452800).

Almost surely, 2^21132222404 is an apocalyptic number.

It is an amenable number.

21132222404 is a deficient number, since it is larger than the sum of its proper divisors (16390644796).

21132222404 is a wasteful number, since it uses less digits than its factorization.

21132222404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279467 (or 279465 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21132222404 its reverse (40422223112), we get a palindrome (61554445516).

The spelling of 21132222404 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-two thousand, four hundred four".