120100055 has 4 divisors (see below), whose sum is σ = 144120072. Its totient is φ = 96080040.

The previous prime is 120100051. The next prime is 120100061. The reversal of 120100055 is 550001021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550001021 = 397 ⋅1385393.

It is not a de Polignac number, because 120100055 - 2² = 120100051 is a prime.

It is a super-2 number, since 2×120100055² = 28848046422006050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100051) 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, 12010001 + ... + 12010010.

It is an arithmetic number, because the mean of its divisors is an integer number (36030018).

Almost surely, 2^120100055 is an apocalyptic number.

120100055 is a deficient number, since it is larger than the sum of its proper divisors (24020017).

120100055 is an equidigital number, since it uses as much as digits as its factorization.

120100055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24020016.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 120100055 is about 10959.0170635874. The cubic root of 120100055 is about 493.3794639214.

Adding to 120100055 its reverse (550001021), we get a palindrome (670101076).

The spelling of 120100055 in words is "one hundred twenty million, one hundred thousand, fifty-five".