202110000121 has 8 divisors (see below), whose sum is σ = 209155339080. Its totient is φ = 195069729792.

The previous prime is 202110000109. The next prime is 202110000247. The reversal of 202110000121 is 121000011202.

It can be written as a sum of positive squares in 4 ways, for example, as 72967515625 + 129142484496 = 270125^2 + 359364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202110000121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202110000098 and 202110000107.

It is not an unprimeable number, because it can be changed into a prime (202110010121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185930 + ... + 1345603.

It is an arithmetic number, because the mean of its divisors is an integer number (26144417385).

Almost surely, 2^202110000121 is an apocalyptic number.

It is an amenable number.

202110000121 is a deficient number, since it is larger than the sum of its proper divisors (7045338959).

202110000121 is a wasteful number, since it uses less digits than its factorization.

202110000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534315.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 202110000121 its reverse (121000011202), we get a palindrome (323110011323).

The spelling of 202110000121 in words is "two hundred two billion, one hundred ten million, one hundred twenty-one", and thus it is an aban number.