21100120212201 has 12 divisors (see below), whose sum is σ = 28618414520112. Its totient is φ = 13828327363864.

The previous prime is 21100120212173. The next prime is 21100120212221. The reversal of 21100120212201 is 10221202100112.

It is not a de Polignac number, because 21100120212201 - 2⁵ = 21100120212169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100120212221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010241411 + ... + 1010262296.

It is an arithmetic number, because the mean of its divisors is an integer number (2384867876676).

Almost surely, 2^{21100120212201} is an apocalyptic number.

It is an amenable number.

21100120212201 is a deficient number, since it is larger than the sum of its proper divisors (7518294307911).

21100120212201 is an equidigital number, since it uses as much as digits as its factorization.

21100120212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020503828 (or 2020503769 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100120212201 its reverse (10221202100112), we get a palindrome (31321322312313).

The spelling of 21100120212201 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, two hundred twelve thousand, two hundred one".