102000010121 has 4 divisors (see below), whose sum is σ = 102001760532. Its totient is φ = 101998259712.

The previous prime is 102000010111. The next prime is 102000010157. The reversal of 102000010121 is 121010000201.

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 37534800121 + 64465210000 = 193739^2 + 253900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102000010121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102000010099 and 102000010108.

It is not an unprimeable number, because it can be changed into a prime (102000010111) 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, 784676 + ... + 905381.

It is an arithmetic number, because the mean of its divisors is an integer number (25500440133).

Almost surely, 2^102000010121 is an apocalyptic number.

It is an amenable number.

102000010121 is a deficient number, since it is larger than the sum of its proper divisors (1750411).

102000010121 is an equidigital number, since it uses as much as digits as its factorization.

102000010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750410.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102000010121 its reverse (121010000201), we get a palindrome (223010010322).

The spelling of 102000010121 in words is "one hundred two billion, ten thousand, one hundred twenty-one".