21100201122191 has 2 divisors, whose sum is σ = 21100201122192. Its totient is φ = 21100201122190.

The previous prime is 21100201122163. The next prime is 21100201122233. The reversal of 21100201122191 is 19122110200112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100201122191 - 2⁶ = 21100201122127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100201127191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550100561095 + 10550100561096.

It is an arithmetic number, because the mean of its divisors is an integer number (10550100561096).

Almost surely, 2^{21100201122191} is an apocalyptic number.

21100201122191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100201122191 is an equidigital number, since it uses as much as digits as its factorization.

21100201122191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 21100201122191 in words is "twenty-one trillion, one hundred billion, two hundred one million, one hundred twenty-two thousand, one hundred ninety-one".