21100233321911 has 2 divisors, whose sum is σ = 21100233321912. Its totient is φ = 21100233321910.

The previous prime is 21100233321899. The next prime is 21100233321941. The reversal of 21100233321911 is 11912333200112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100233321911 - 2²⁶ = 21100166213047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100233321941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550116660955 + 10550116660956.

It is an arithmetic number, because the mean of its divisors is an integer number (10550116660956).

Almost surely, 2^{21100233321911} is an apocalyptic number.

21100233321911 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100233321911 is an equidigital number, since it uses as much as digits as its factorization.

21100233321911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 21100233321911 in words is "twenty-one trillion, one hundred billion, two hundred thirty-three million, three hundred twenty-one thousand, nine hundred eleven".