111971604193 has 4 divisors (see below), whose sum is σ = 111977852848. Its totient is φ = 111965355540.

The previous prime is 111971604149. The next prime is 111971604263. The reversal of 111971604193 is 391406179111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 391406179111 = 17449 ⋅22431439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111971604193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111971604893) 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, 3097371 + ... + 3133312.

It is an arithmetic number, because the mean of its divisors is an integer number (27994463212).

Almost surely, 2^111971604193 is an apocalyptic number.

It is an amenable number.

111971604193 is a deficient number, since it is larger than the sum of its proper divisors (6248655).

111971604193 is an equidigital number, since it uses as much as digits as its factorization.

111971604193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248654.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 111971604193 in words is "one hundred eleven billion, nine hundred seventy-one million, six hundred four thousand, one hundred ninety-three".