21232131222000 has 80 divisors (see below), whose sum is σ = 68452391079072. Its totient is φ = 5661901657600.

The previous prime is 21232131221971. The next prime is 21232131222013. The reversal of 21232131222000 is 22213123212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1769338269 + ... + 1769350268.

Almost surely, 2^{21232131222000} is an apocalyptic number.

21232131222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232131222000 is an abundant number, since it is smaller than the sum of its proper divisors (47220259857072).

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

21232131222000 is a wasteful number, since it uses less digits than its factorization.

21232131222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538688563 (or 3538688547 counting only the distinct ones).

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

Adding to 21232131222000 its reverse (22213123212), we get a palindrome (21254344345212).

The spelling of 21232131222000 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred thirty-one million, two hundred twenty-two thousand".