21211112022200 has 48 divisors (see below), whose sum is σ = 49324473344160. Its totient is φ = 8482958720000.

The previous prime is 21211112022169. The next prime is 21211112022209. The reversal of 21211112022200 is 222021111212.

It is a super-2 number, since 2×21211112022200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211112022209) 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, 8143001 + ... + 10427400.

It is an arithmetic number, because the mean of its divisors is an integer number (1027593194670).

Almost surely, 2^{21211112022200} is an apocalyptic number.

21211112022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211112022200 is an abundant number, since it is smaller than the sum of its proper divisors (28113361321960).

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

21211112022200 is a wasteful number, since it uses less digits than its factorization.

21211112022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18576128 (or 18576119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211112022200 its reverse (222021111212), we get a palindrome (21433133133412).

The spelling of 21211112022200 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, twenty-two thousand, two hundred".