111291580109 has 4 divisors (see below), whose sum is σ = 111913320960. Its totient is φ = 110669839260.

The previous prime is 111291580093. The next prime is 111291580151. The reversal of 111291580109 is 901085192111.

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.

It is a cyclic number.

It is not a de Polignac number, because 111291580109 - 2⁴ = 111291580093 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 (111291580159) 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, 310870157 + ... + 310870514.

It is an arithmetic number, because the mean of its divisors is an integer number (27978330240).

Almost surely, 2^111291580109 is an apocalyptic number.

It is an amenable number.

111291580109 is a deficient number, since it is larger than the sum of its proper divisors (621740851).

111291580109 is an equidigital number, since it uses as much as digits as its factorization.

111291580109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621740850.

The product of its (nonzero) digits is 6480, while the sum is 38.

The spelling of 111291580109 in words is "one hundred eleven billion, two hundred ninety-one million, five hundred eighty thousand, one hundred nine".