21112022201100 has 72 divisors (see below), whose sum is σ = 61092599490048. Its totient is φ = 5629090843200.

The previous prime is 21112022201063. The next prime is 21112022201177. The reversal of 21112022201100 is 110222021112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21112022201100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2720196 + ... + 7044395.

Almost surely, 2^{21112022201100} is an apocalyptic number.

21112022201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112022201100 is an abundant number, since it is smaller than the sum of its proper divisors (39980577288948).

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

21112022201100 is a wasteful number, since it uses less digits than its factorization.

21112022201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9771815 (or 9771808 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112022201100 its reverse (110222021112), we get a palindrome (21222244222212).

The spelling of 21112022201100 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred one thousand, one hundred".