110111112120021 has 16 divisors (see below), whose sum is σ = 147008121099840. Its totient is φ = 73310804058240.

The previous prime is 110111112120011. The next prime is 110111112120043. The reversal of 110111112120021 is 120021211111011.

It is not a de Polignac number, because 110111112120021 - 2⁵ = 110111112119989 is a prime.

It is a super-2 number, since 2×110111112120021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111112120011) 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, 3040026 + ... + 15148068.

It is an arithmetic number, because the mean of its divisors is an integer number (9188007568740).

Almost surely, 2^{110111112120021} is an apocalyptic number.

It is an amenable number.

110111112120021 is a deficient number, since it is larger than the sum of its proper divisors (36897008979819).

110111112120021 is a wasteful number, since it uses less digits than its factorization.

110111112120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12112036.

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

Adding to 110111112120021 its reverse (120021211111011), we get a palindrome (230132323231032).

The spelling of 110111112120021 in words is "one hundred ten trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty thousand, twenty-one".