111212312099 has 8 divisors (see below), whose sum is σ = 127109878368. Its totient is φ = 95317269120.

The previous prime is 111212312063. The next prime is 111212312131. The reversal of 111212312099 is 990213212111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111212312099 - 2²⁰ = 111211263523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212312009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535412 + ... + 713505.

It is an arithmetic number, because the mean of its divisors is an integer number (15888734796).

Almost surely, 2^111212312099 is an apocalyptic number.

111212312099 is a deficient number, since it is larger than the sum of its proper divisors (15897566269).

111212312099 is a wasteful number, since it uses less digits than its factorization.

111212312099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261645.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 111212312099 in words is "one hundred eleven billion, two hundred twelve million, three hundred twelve thousand, ninety-nine".