100120210121 has 4 divisors (see below), whose sum is σ = 100168743552. Its totient is φ = 100071676692.

The previous prime is 100120210111. The next prime is 100120210129. The reversal of 100120210121 is 121012021001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100120210121 - 2²⁶ = 100053101257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100120210129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24263621 + ... + 24267746.

It is an arithmetic number, because the mean of its divisors is an integer number (25042185888).

Almost surely, 2^100120210121 is an apocalyptic number.

It is an amenable number.

100120210121 is a deficient number, since it is larger than the sum of its proper divisors (48533431).

100120210121 is an equidigital number, since it uses as much as digits as its factorization.

100120210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48533430.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100120210121 its reverse (121012021001), we get a palindrome (221132231122).

The spelling of 100120210121 in words is "one hundred billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".