21222231132 has 12 divisors (see below), whose sum is σ = 49518539336. Its totient is φ = 7074077040.

The previous prime is 21222231119. The next prime is 21222231161. The reversal of 21222231132 is 23113222212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21222231099 and 21222231108.

It is a congruent number.

It is an unprimeable number.

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, 884259619 + ... + 884259642.

Almost surely, 2^21222231132 is an apocalyptic number.

It is an amenable number.

21222231132 is an abundant number, since it is smaller than the sum of its proper divisors (28296308204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222231132 is a wasteful number, since it uses less digits than its factorization.

21222231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768519268 (or 1768519266 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 21222231132 its reverse (23113222212), we get a palindrome (44335453344).

The spelling of 21222231132 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, one hundred thirty-two".