120212555 has 4 divisors (see below), whose sum is σ = 144255072. Its totient is φ = 96170040.

The previous prime is 120212537. The next prime is 120212557. The reversal of 120212555 is 555212021.

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

It is not a de Polignac number, because 120212555 - 2²⁶ = 53103691 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 120212555.

It is not an unprimeable number, because it can be changed into a prime (120212557) by changing a digit.

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, 12021251 + ... + 12021260.

It is an arithmetic number, because the mean of its divisors is an integer number (36063768).

Almost surely, 2^120212555 is an apocalyptic number.

120212555 is a deficient number, since it is larger than the sum of its proper divisors (24042517).

120212555 is an equidigital number, since it uses as much as digits as its factorization.

120212555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24042516.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 120212555 is about 10964.1486217581. The cubic root of 120212555 is about 493.5334684798.

Adding to 120212555 its reverse (555212021), we get a palindrome (675424576).

The spelling of 120212555 in words is "one hundred twenty million, two hundred twelve thousand, five hundred fifty-five".