21101222102111 has 2 divisors, whose sum is σ = 21101222102112. Its totient is φ = 21101222102110.

The previous prime is 21101222102017. The next prime is 21101222102119. The reversal of 21101222102111 is 11120122210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101222102111 - 2¹⁰ = 21101222101087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101222102111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101222102119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550611051055 + 10550611051056.

It is an arithmetic number, because the mean of its divisors is an integer number (10550611051056).

Almost surely, 2^{21101222102111} is an apocalyptic number.

21101222102111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101222102111 is an equidigital number, since it uses as much as digits as its factorization.

21101222102111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21101222102111 its reverse (11120122210112), we get a palindrome (32221344312223).

The spelling of 21101222102111 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-two million, one hundred two thousand, one hundred eleven".