120111112109 has 4 divisors (see below), whose sum is σ = 120115470204. Its totient is φ = 120106754016.

The previous prime is 120111112087. The next prime is 120111112127. The reversal of 120111112109 is 901211111021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109960549609 + 10150562500 = 331603^2 + 100750^2 .

It is a cyclic number.

It is not a de Polignac number, because 120111112109 - 2³² = 115816144813 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 (120111112159) 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, 2137442 + ... + 2192915.

It is an arithmetic number, because the mean of its divisors is an integer number (30028867551).

Almost surely, 2^120111112109 is an apocalyptic number.

It is an amenable number.

120111112109 is a deficient number, since it is larger than the sum of its proper divisors (4358095).

120111112109 is an equidigital number, since it uses as much as digits as its factorization.

120111112109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358094.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 120111112109 in words is "one hundred twenty billion, one hundred eleven million, one hundred twelve thousand, one hundred nine".