122155555 has 4 divisors (see below), whose sum is σ = 146586672. Its totient is φ = 97724440.

The previous prime is 122155549. The next prime is 122155573. The reversal of 122155555 is 555551221.

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

It is not a de Polignac number, because 122155555 - 2⁹ = 122155043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12215551 + ... + 12215560.

It is an arithmetic number, because the mean of its divisors is an integer number (36646668).

Almost surely, 2^122155555 is an apocalyptic number.

122155555 is a deficient number, since it is larger than the sum of its proper divisors (24431117).

122155555 is an equidigital number, since it uses as much as digits as its factorization.

122155555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24431116.

The product of its digits is 12500, while the sum is 31.

The square root of 122155555 is about 11052.4004180088. The cubic root of 122155555 is about 496.1782698490.

The spelling of 122155555 in words is "one hundred twenty-two million, one hundred fifty-five thousand, five hundred fifty-five".