111121110999 has 12 divisors (see below), whose sum is σ = 163228751400. Its totient is φ = 72825134544.

The previous prime is 111121110943. The next prime is 111121111033. The reversal of 111121110999 is 999011121111.

It is not a de Polignac number, because 111121110999 - 2⁷ = 111121110871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121110799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104633284 + ... + 104634345.

It is an arithmetic number, because the mean of its divisors is an integer number (13602395950).

Almost surely, 2^111121110999 is an apocalyptic number.

111121110999 is a deficient number, since it is larger than the sum of its proper divisors (52107640401).

111121110999 is a wasteful number, since it uses less digits than its factorization.

111121110999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209267694 (or 209267691 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 36.

The spelling of 111121110999 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred ten thousand, nine hundred ninety-nine".