111111121199 has 32 divisors (see below), whose sum is σ = 126986517504. Its totient is φ = 96442536960.

The previous prime is 111111121189. The next prime is 111111121213. The reversal of 111111121199 is 991121111111.

It is not a de Polignac number, because 111111121199 - 2²⁸ = 110842685743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111121109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7486424 + ... + 7501250.

It is an arithmetic number, because the mean of its divisors is an integer number (3968328672).

Almost surely, 2^111111121199 is an apocalyptic number.

111111121199 is a deficient number, since it is larger than the sum of its proper divisors (15875396305).

111111121199 is a wasteful number, since it uses less digits than its factorization.

111111121199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15287.

The product of its digits is 162, while the sum is 29.

The spelling of 111111121199 in words is "one hundred eleven billion, one hundred eleven million, one hundred twenty-one thousand, one hundred ninety-nine".