21111202022200 has 48 divisors (see below), whose sum is σ = 49569520439160. Its totient is φ = 8360872080000.

The previous prime is 21111202022189. The next prime is 21111202022201. The reversal of 21111202022200 is 222020211112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111202022201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522534306 + ... + 522574705.

Almost surely, 2^{21111202022200} is an apocalyptic number.

21111202022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111202022200 is an abundant number, since it is smaller than the sum of its proper divisors (28458318416960).

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

21111202022200 is a wasteful number, since it uses less digits than its factorization.

21111202022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045109128 (or 1045109119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21111202022200 its reverse (222020211112), we get a palindrome (21333222233312).

The spelling of 21111202022200 in words is "twenty-one trillion, one hundred eleven billion, two hundred two million, twenty-two thousand, two hundred".