111812445021 has 16 divisors (see below), whose sum is σ = 151405862400. Its totient is φ = 73381762608.

The previous prime is 111812445007. The next prime is 111812445047. The reversal of 111812445021 is 120544218111.

It is not a de Polignac number, because 111812445021 - 2⁷ = 111812444893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111812445021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111812445061) 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, 134950 + ... + 491768.

It is an arithmetic number, because the mean of its divisors is an integer number (9462866400).

Almost surely, 2^111812445021 is an apocalyptic number.

It is an amenable number.

111812445021 is a deficient number, since it is larger than the sum of its proper divisors (39593417379).

111812445021 is a wasteful number, since it uses less digits than its factorization.

111812445021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358448.

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 111812445021 in words is "one hundred eleven billion, eight hundred twelve million, four hundred forty-five thousand, twenty-one".