21214132255320 has 32 divisors (see below), whose sum is σ = 63642396766320. Its totient is φ = 5657101934720.

The previous prime is 21214132255279. The next prime is 21214132255397. The reversal of 21214132255320 is 2355223141212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88392217611 + ... + 88392217850.

Almost surely, 2^{21214132255320} is an apocalyptic number.

21214132255320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214132255320 is an abundant number, since it is smaller than the sum of its proper divisors (42428264511000).

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

21214132255320 is a wasteful number, since it uses less digits than its factorization.

21214132255320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176784435475 (or 176784435471 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21214132255320 its reverse (2355223141212), we get a palindrome (23569355396532).

The spelling of 21214132255320 in words is "twenty-one trillion, two hundred fourteen billion, one hundred thirty-two million, two hundred fifty-five thousand, three hundred twenty".