202100000121 has 24 divisors (see below), whose sum is σ = 305067325056. Its totient is φ = 128683779840.

The previous prime is 202100000119. The next prime is 202100000159. The reversal of 202100000121 is 121000001202.

202100000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202100000121 - 2¹ = 202100000119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (202100000161) 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 23 ways as a sum of consecutive naturals, for example, 586045 + ... + 864666.

It is an arithmetic number, because the mean of its divisors is an integer number (12711138544).

Almost surely, 2^202100000121 is an apocalyptic number.

It is an amenable number.

202100000121 is a deficient number, since it is larger than the sum of its proper divisors (102967324935).

202100000121 is a wasteful number, since it uses less digits than its factorization.

202100000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451413 (or 1451410 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 202100000121 its reverse (121000001202), we get a palindrome (323100001323).

The spelling of 202100000121 in words is "two hundred two billion, one hundred million, one hundred twenty-one", and thus it is an aban number.