21100122100139 has 2 divisors, whose sum is σ = 21100122100140. Its totient is φ = 21100122100138.

The previous prime is 21100122100111. The next prime is 21100122100153. The reversal of 21100122100139 is 93100122100112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100122100139 - 2¹⁶ = 21100122034603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100122100199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550061050069 + 10550061050070.

It is an arithmetic number, because the mean of its divisors is an integer number (10550061050070).

Almost surely, 2^{21100122100139} is an apocalyptic number.

21100122100139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100122100139 is an equidigital number, since it uses as much as digits as its factorization.

21100122100139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21100122100139 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, one hundred thousand, one hundred thirty-nine".