21223106455332 has 12 divisors (see below), whose sum is σ = 49520581729136. Its totient is φ = 7074368818440.

The previous prime is 21223106455319. The next prime is 21223106455381. The reversal of 21223106455332 is 23355460132212.

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

It is a super-2 number, since 2×21223106455332² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884296102294 + ... + 884296102317.

Almost surely, 2^{21223106455332} is an apocalyptic number.

It is an amenable number.

21223106455332 is an abundant number, since it is smaller than the sum of its proper divisors (28297475273804).

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

21223106455332 is a wasteful number, since it uses less digits than its factorization.

21223106455332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768592204618 (or 1768592204616 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 21223106455332 its reverse (23355460132212), we get a palindrome (44578566587544).

The spelling of 21223106455332 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred six million, four hundred fifty-five thousand, three hundred thirty-two".