21100220102111 has 2 divisors, whose sum is σ = 21100220102112. Its totient is φ = 21100220102110.

The previous prime is 21100220101997. The next prime is 21100220102113. The reversal of 21100220102111 is 11120102200112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100220102111 - 2²² = 21100215907807 is a prime.

Together with 21100220102113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100220102113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550110051055 + 10550110051056.

It is an arithmetic number, because the mean of its divisors is an integer number (10550110051056).

Almost surely, 2^{21100220102111} is an apocalyptic number.

21100220102111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100220102111 is an equidigital number, since it uses as much as digits as its factorization.

21100220102111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21100220102111 its reverse (11120102200112), we get a palindrome (32220322302223).

The spelling of 21100220102111 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, one hundred two thousand, one hundred eleven".