111023121110021 has 16 divisors (see below), whose sum is σ = 112426362659520. Its totient is φ = 109623445979520.

The previous prime is 111023121110009. The next prime is 111023121110029. The reversal of 111023121110021 is 120011121320111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111023121110021 is a prime.

It is a super-2 number, since 2×111023121110021² (a number of 29 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 (111023121110029) 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, 187794530 + ... + 188384796.

It is an arithmetic number, because the mean of its divisors is an integer number (7026647666220).

Almost surely, 2^{111023121110021} is an apocalyptic number.

It is an amenable number.

111023121110021 is a deficient number, since it is larger than the sum of its proper divisors (1403241549499).

111023121110021 is a wasteful number, since it uses less digits than its factorization.

111023121110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593284.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 111023121110021 its reverse (120011121320111), we get a palindrome (231034242430132).

The spelling of 111023121110021 in words is "one hundred eleven trillion, twenty-three billion, one hundred twenty-one million, one hundred ten thousand, twenty-one".