202010000121 has 12 divisors (see below), whose sum is σ = 299678499172. Its totient is φ = 131033513376.

The previous prime is 202010000107. The next prime is 202010000131. The reversal of 202010000121 is 121000010202.

It can be written as a sum of positive squares in 2 ways, for example, as 91240847721 + 110769152400 = 302061^2 + 332820^2 .

It is not a de Polignac number, because 202010000121 - 2⁶ = 202010000057 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202010000131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 303317986 + ... + 303318651.

Almost surely, 2^202010000121 is an apocalyptic number.

It is an amenable number.

202010000121 is a deficient number, since it is larger than the sum of its proper divisors (97668499051).

202010000121 is a wasteful number, since it uses less digits than its factorization.

202010000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606636680 (or 606636677 counting only the distinct ones).

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

Adding to 202010000121 its reverse (121000010202), we get a palindrome (323010010323).

The spelling of 202010000121 in words is "two hundred two billion, ten million, one hundred twenty-one", and thus it is an aban number.