21100021022200 has 96 divisors (see below), whose sum is σ = 50751089110800. Its totient is φ = 8148668451840.

The previous prime is 21100021022189. The next prime is 21100021022261. The reversal of 21100021022200 is 222012000112.

It is a happy number.

It is a congruent number.

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, 211400707 + ... + 211500493.

Almost surely, 2^{21100021022200} is an apocalyptic number.

21100021022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100021022200 is an abundant number, since it is smaller than the sum of its proper divisors (29651068088600).

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

21100021022200 is a wasteful number, since it uses less digits than its factorization.

21100021022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136289 (or 136280 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21100021022200 its reverse (222012000112), we get a palindrome (21322033022312).

The spelling of 21100021022200 in words is "twenty-one trillion, one hundred billion, twenty-one million, twenty-two thousand, two hundred".