111012020111905 has 32 divisors (see below), whose sum is σ = 146313125020800. Its totient is φ = 80187055841280.

The previous prime is 111012020111903. The next prime is 111012020112029. The reversal of 111012020111905 is 509111020210111.

It is not a de Polignac number, because 111012020111905 - 2¹ = 111012020111903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111012020111905.

It is not an unprimeable number, because it can be changed into a prime (111012020111903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92771134 + ... + 93960136.

It is an arithmetic number, because the mean of its divisors is an integer number (4572285156900).

Almost surely, 2^{111012020111905} is an apocalyptic number.

It is an amenable number.

111012020111905 is a deficient number, since it is larger than the sum of its proper divisors (35301104908895).

111012020111905 is a wasteful number, since it uses less digits than its factorization.

111012020111905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200561.

The product of its (nonzero) digits is 180, while the sum is 25.

The spelling of 111012020111905 in words is "one hundred eleven trillion, twelve billion, twenty million, one hundred eleven thousand, nine hundred five".