111112110111021 has 16 divisors (see below), whose sum is σ = 148229775744000. Its totient is φ = 74034595375920.

The previous prime is 111112110111007. The next prime is 111112110111127. The reversal of 111112110111021 is 120111011211111.

It is a happy number.

It is not a de Polignac number, because 111112110111021 - 2¹⁹ = 111112109586733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112110111001) 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, 148129606 + ... + 148877816.

It is an arithmetic number, because the mean of its divisors is an integer number (9264360984000).

Almost surely, 2^{111112110111021} is an apocalyptic number.

It is an amenable number.

111112110111021 is a deficient number, since it is larger than the sum of its proper divisors (37117665632979).

111112110111021 is a wasteful number, since it uses less digits than its factorization.

111112110111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774976.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111112110111021 its reverse (120111011211111), we get a palindrome (231223121322132).

The spelling of 111112110111021 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred ten million, one hundred eleven thousand, twenty-one".