111120223109 has 4 divisors (see below), whose sum is σ = 126994540704. Its totient is φ = 95245905516.

The previous prime is 111120223079. The next prime is 111120223133. The reversal of 111120223109 is 901322021111.

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: 901322021111 = 509 ⋅1770770179.

It is a cyclic number.

It is not a de Polignac number, because 111120223109 - 2²⁸ = 110851787653 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 (111120223169) 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, 7937158787 + ... + 7937158800.

It is an arithmetic number, because the mean of its divisors is an integer number (31748635176).

Almost surely, 2^111120223109 is an apocalyptic number.

It is an amenable number.

111120223109 is a deficient number, since it is larger than the sum of its proper divisors (15874317595).

111120223109 is an equidigital number, since it uses as much as digits as its factorization.

111120223109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874317594.

The product of its (nonzero) digits is 216, while the sum is 23.

It can be divided in two parts, 1111202 and 23109, that added together give a palindrome (1134311).

The spelling of 111120223109 in words is "one hundred eleven billion, one hundred twenty million, two hundred twenty-three thousand, one hundred nine".