21021120133100 has 18 divisors (see below), whose sum is σ = 45615830689044. Its totient is φ = 8408448053200.

The previous prime is 21021120133099. The next prime is 21021120133127. The reversal of 21021120133100 is 133102112012.

It is a super-2 number, since 2×21021120133100² (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 5 ways as a sum of consecutive naturals, for example, 105105600566 + ... + 105105600765.

It is an arithmetic number, because the mean of its divisors is an integer number (2534212816058).

Almost surely, 2^{21021120133100} is an apocalyptic number.

21021120133100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021120133100 is an abundant number, since it is smaller than the sum of its proper divisors (24594710555944).

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

21021120133100 is a wasteful number, since it uses less digits than its factorization.

21021120133100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210211201345 (or 210211201338 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21021120133100 its reverse (133102112012), we get a palindrome (21154222245112).

The spelling of 21021120133100 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, one hundred".