21110120000111 has 2 divisors, whose sum is σ = 21110120000112. Its totient is φ = 21110120000110.

The previous prime is 21110120000063. The next prime is 21110120000129. The reversal of 21110120000111 is 11100002101112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110120000111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110120000092 and 21110120000101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110120000611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555060000055 + 10555060000056.

It is an arithmetic number, because the mean of its divisors is an integer number (10555060000056).

Almost surely, 2^{21110120000111} is an apocalyptic number.

21110120000111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110120000111 is an equidigital number, since it uses as much as digits as its factorization.

21110120000111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21110120000111 its reverse (11100002101112), we get a palindrome (32210122101223).

The spelling of 21110120000111 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, one hundred eleven", and thus it is an aban number.