21101122109999 has 2 divisors, whose sum is σ = 21101122110000. Its totient is φ = 21101122109998.

The previous prime is 21101122109939. The next prime is 21101122110067. The reversal of 21101122109999 is 99990122110112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101122109999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101122109939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550561054999 + 10550561055000.

It is an arithmetic number, because the mean of its divisors is an integer number (10550561055000).

Almost surely, 2^{21101122109999} is an apocalyptic number.

21101122109999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101122109999 is an equidigital number, since it uses as much as digits as its factorization.

21101122109999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 21101122109999 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, one hundred nine thousand, nine hundred ninety-nine".