111367871999 has 4 divisors (see below), whose sum is σ = 111368757936. Its totient is φ = 111366986064.

The previous prime is 111367871987. The next prime is 111367872013. The reversal of 111367871999 is 999178763111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111367871999 - 2²⁸ = 111099436543 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 (111367871929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215459 + ... + 518804.

It is an arithmetic number, because the mean of its divisors is an integer number (27842189484).

Almost surely, 2^111367871999 is an apocalyptic number.

111367871999 is a deficient number, since it is larger than the sum of its proper divisors (885937).

111367871999 is an equidigital number, since it uses as much as digits as its factorization.

111367871999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885936.

The product of its digits is 5143824, while the sum is 62.

The spelling of 111367871999 in words is "one hundred eleven billion, three hundred sixty-seven million, eight hundred seventy-one thousand, nine hundred ninety-nine".