21110002211111 has 6 divisors (see below), whose sum is σ = 23203556149536. Its totient is φ = 19190911100900.

The previous prime is 21110002211017. The next prime is 21110002211117. The reversal of 21110002211111 is 11111220001112.

It is not a de Polignac number, because 21110002211111 - 2²⁶ = 21109935102247 is a prime.

It is a super-2 number, since 2×21110002211111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110002211117) 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 in 5 ways as a sum of consecutive naturals, for example, 87231413975 + ... + 87231414216.

It is an arithmetic number, because the mean of its divisors is an integer number (3867259358256).

Almost surely, 2^{21110002211111} is an apocalyptic number.

21110002211111 is a deficient number, since it is larger than the sum of its proper divisors (2093553938425).

21110002211111 is a wasteful number, since it uses less digits than its factorization.

21110002211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174462828213 (or 174462828202 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110002211111 its reverse (11111220001112), we get a palindrome (32221222212223).

The spelling of 21110002211111 in words is "twenty-one trillion, one hundred ten billion, two million, two hundred eleven thousand, one hundred eleven".