120113555 has 4 divisors (see below), whose sum is σ = 144136272. Its totient is φ = 96090840.

The previous prime is 120113549. The next prime is 120113569. The reversal of 120113555 is 555311021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555311021 = 19289 ⋅28789.

It is a de Polignac number, because none of the positive numbers 2^k-120113555 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120113555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12011351 + ... + 12011360.

It is an arithmetic number, because the mean of its divisors is an integer number (36034068).

Almost surely, 2^120113555 is an apocalyptic number.

120113555 is a deficient number, since it is larger than the sum of its proper divisors (24022717).

120113555 is an equidigital number, since it uses as much as digits as its factorization.

120113555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24022716.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 120113555 is about 10959.6329774313. The cubic root of 120113555 is about 493.3979495450.

Adding to 120113555 its reverse (555311021), we get a palindrome (675424576).

The spelling of 120113555 in words is "one hundred twenty million, one hundred thirteen thousand, five hundred fifty-five".