21331230100120 has 32 divisors (see below), whose sum is σ = 48022186151520. Its totient is φ = 8527706542080.

The previous prime is 21331230100069. The next prime is 21331230100127. The reversal of 21331230100120 is 2100103213312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331230100127) 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, 149474601 + ... + 149617240.

It is an arithmetic number, because the mean of its divisors is an integer number (1500693317235).

Almost surely, 2^{21331230100120} is an apocalyptic number.

21331230100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331230100120 is an abundant number, since it is smaller than the sum of its proper divisors (26690956051400).

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

21331230100120 is a wasteful number, since it uses less digits than its factorization.

21331230100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299093635 (or 299093631 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21331230100120 its reverse (2100103213312), we get a palindrome (23431333313432).

The spelling of 21331230100120 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred thirty million, one hundred thousand, one hundred twenty".