21101122201099 has 2 divisors, whose sum is σ = 21101122201100. Its totient is φ = 21101122201098.

The previous prime is 21101122201097. The next prime is 21101122201121. The reversal of 21101122201099 is 99010222110112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101122201099 - 2¹ = 21101122201097 is a prime.

Together with 21101122201097, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21101122201099.

It is not a weakly prime, because it can be changed into another prime (21101122201097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550561100549 + 10550561100550.

It is an arithmetic number, because the mean of its divisors is an integer number (10550561100550).

Almost surely, 2^{21101122201099} is an apocalyptic number.

21101122201099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101122201099 is an equidigital number, since it uses as much as digits as its factorization.

21101122201099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21101122201099 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, two hundred one thousand, ninety-nine".