111021121111918 has 32 divisors (see below), whose sum is σ = 177518953684800. Its totient is φ = 51892289579520.

The previous prime is 111021121111907. The next prime is 111021121111919. The reversal of 111021121111918 is 819111121120111.

It is a self number, because there is not a number n which added to its sum of digits gives 111021121111918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021121111919) 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, 116362048 + ... + 117312268.

It is an arithmetic number, because the mean of its divisors is an integer number (5547467302650).

Almost surely, 2^{111021121111918} is an apocalyptic number.

111021121111918 is a deficient number, since it is larger than the sum of its proper divisors (66497832572882).

111021121111918 is a wasteful number, since it uses less digits than its factorization.

111021121111918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973452.

The product of its (nonzero) digits is 288, while the sum is 31.

The spelling of 111021121111918 in words is "one hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred eighteen".