100102120212121 has 4 divisors (see below), whose sum is σ = 100275607422772. Its totient is φ = 99928633001472.

The previous prime is 100102120212023. The next prime is 100102120212197. The reversal of 100102120212121 is 121212021201001.

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 49111166980096 + 50990953232025 = 7007936^2 + 7140795^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102120212121 - 2⁹ = 100102120211609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100102120212095 and 100102120212104.

It is not an unprimeable number, because it can be changed into a prime (100102120212821) 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, 86743604460 + ... + 86743605613.

It is an arithmetic number, because the mean of its divisors is an integer number (25068901855693).

Almost surely, 2^{100102120212121} is an apocalyptic number.

It is an amenable number.

100102120212121 is a deficient number, since it is larger than the sum of its proper divisors (173487210651).

100102120212121 is an equidigital number, since it uses as much as digits as its factorization.

100102120212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173487210650.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100102120212121 its reverse (121212021201001), we get a palindrome (221314141413122).

The spelling of 100102120212121 in words is "one hundred trillion, one hundred two billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-one".