100121350055 has 4 divisors (see below), whose sum is σ = 120145620072. Its totient is φ = 80097080040.

The previous prime is 100121350051. The next prime is 100121350073. The reversal of 100121350055 is 550053121001.

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: 550053121001 = 23 ⋅23915353087.

It is not a de Polignac number, because 100121350055 - 2² = 100121350051 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 100121350055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121350051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10012135001 + ... + 10012135010.

It is an arithmetic number, because the mean of its divisors is an integer number (30036405018).

Almost surely, 2^100121350055 is an apocalyptic number.

100121350055 is a deficient number, since it is larger than the sum of its proper divisors (20024270017).

100121350055 is an equidigital number, since it uses as much as digits as its factorization.

100121350055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20024270016.

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

Adding to 100121350055 its reverse (550053121001), we get a palindrome (650174471056).

The spelling of 100121350055 in words is "one hundred billion, one hundred twenty-one million, three hundred fifty thousand, fifty-five".