21200112212120 has 32 divisors (see below), whose sum is σ = 48016148202720. Its totient is φ = 8423885644800.

The previous prime is 21200112212119. The next prime is 21200112212261. The reversal of 21200112212120 is 2121221100212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1754970137 + ... + 1754982216.

It is an arithmetic number, because the mean of its divisors is an integer number (1500504631335).

Almost surely, 2^{21200112212120} is an apocalyptic number.

21200112212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200112212120 is an abundant number, since it is smaller than the sum of its proper divisors (26816035990600).

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

21200112212120 is a wasteful number, since it uses less digits than its factorization.

21200112212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509952515 (or 3509952511 counting only the distinct ones).

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

Adding to 21200112212120 its reverse (2121221100212), we get a palindrome (23321333312332).

The spelling of 21200112212120 in words is "twenty-one trillion, two hundred billion, one hundred twelve million, two hundred twelve thousand, one hundred twenty".