100012120121 has 4 divisors (see below), whose sum is σ = 100448854500. Its totient is φ = 99575385744.

The previous prime is 100012120097. The next prime is 100012120151. The reversal of 100012120121 is 121021210001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62970883600 + 37041236521 = 250940^2 + 192461^2 .

It is a cyclic number.

It is not a de Polignac number, because 100012120121 - 2⁶ = 100012120057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100012120151) 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, 218366846 + ... + 218367303.

It is an arithmetic number, because the mean of its divisors is an integer number (25112213625).

Almost surely, 2^100012120121 is an apocalyptic number.

It is an amenable number.

100012120121 is a deficient number, since it is larger than the sum of its proper divisors (436734379).

100012120121 is an equidigital number, since it uses as much as digits as its factorization.

100012120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436734378.

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

Adding to 100012120121 its reverse (121021210001), we get a palindrome (221033330122).

The spelling of 100012120121 in words is "one hundred billion, twelve million, one hundred twenty thousand, one hundred twenty-one".