120256111 has 4 divisors (see below), whose sum is σ = 126585400. Its totient is φ = 113926824.

The previous prime is 120256109. The next prime is 120256117. The reversal of 120256111 is 111652021.

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

It is a cyclic number.

It is not a de Polignac number, because 120256111 - 2¹ = 120256109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6329269 = 120256111 / (1 + 2 + 0 + 2 + 5 + 6 + 1 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120256117) 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, 3164616 + ... + 3164653.

It is an arithmetic number, because the mean of its divisors is an integer number (31646350).

Almost surely, 2^120256111 is an apocalyptic number.

120256111 is a deficient number, since it is larger than the sum of its proper divisors (6329289).

120256111 is an equidigital number, since it uses as much as digits as its factorization.

120256111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329288.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 120256111 is about 10966.1347338066. The cubic root of 120256111 is about 493.5930677678.

The spelling of 120256111 in words is "one hundred twenty million, two hundred fifty-six thousand, one hundred eleven".