121788055 has 4 divisors (see below), whose sum is σ = 146145672. Its totient is φ = 97430440.

The previous prime is 121788049. The next prime is 121788061. The reversal of 121788055 is 550887121.

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

It is an interprime number because it is at equal distance from previous prime (121788049) and next prime (121788061).

It is not a de Polignac number, because 121788055 - 2⁷ = 121787927 is a prime.

It is a Duffinian number.

It is a congruent 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, 12178801 + ... + 12178810.

It is an arithmetic number, because the mean of its divisors is an integer number (36536418).

Almost surely, 2^121788055 is an apocalyptic number.

121788055 is a deficient number, since it is larger than the sum of its proper divisors (24357617).

121788055 is an equidigital number, since it uses as much as digits as its factorization.

121788055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24357616.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 121788055 is about 11035.7625472824. The cubic root of 121788055 is about 495.6801926771.

The spelling of 121788055 in words is "one hundred twenty-one million, seven hundred eighty-eight thousand, fifty-five".