21110111122101 has 16 divisors (see below), whose sum is σ = 28189539261120. Its totient is φ = 14052059884800.

The previous prime is 21110111122081. The next prime is 21110111122103. The reversal of 21110111122101 is 10122111101112.

It is not a de Polignac number, because 21110111122101 - 2¹⁴ = 21110111105717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110111122103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3920046 + ... + 7588608.

It is an arithmetic number, because the mean of its divisors is an integer number (1761846203820).

Almost surely, 2^{21110111122101} is an apocalyptic number.

It is an amenable number.

21110111122101 is a deficient number, since it is larger than the sum of its proper divisors (7079428139019).

21110111122101 is a wasteful number, since it uses less digits than its factorization.

21110111122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671476.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21110111122101 its reverse (10122111101112), we get a palindrome (31232222223213).

The spelling of 21110111122101 in words is "twenty-one trillion, one hundred ten billion, one hundred eleven million, one hundred twenty-two thousand, one hundred one".