21021112202200 has 96 divisors (see below), whose sum is σ = 53318869248960. Its totient is φ = 7643799273600.

The previous prime is 21021112202197. The next prime is 21021112202201. The reversal of 21021112202200 is 220221112012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021112202201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78897607 + ... + 79163593.

It is an arithmetic number, because the mean of its divisors is an integer number (555404888010).

Almost surely, 2^{21021112202200} is an apocalyptic number.

21021112202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021112202200 is an abundant number, since it is smaller than the sum of its proper divisors (32297757046760).

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

21021112202200 is a wasteful number, since it uses less digits than its factorization.

21021112202200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301937 (or 301928 counting only the distinct ones).

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

Adding to 21021112202200 its reverse (220221112012), we get a palindrome (21241333314212).

The spelling of 21021112202200 in words is "twenty-one trillion, twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred".