202012101000121 has 6 divisors (see below), whose sum is σ = 214594169574830. Its totient is φ = 190129036235136.

The previous prime is 202012101000119. The next prime is 202012101000173. The reversal of 202012101000121 is 121000101210202.

It can be written as a sum of positive squares in 3 ways, for example, as 17250199928896 + 184761901071225 = 4153336^2 + 13592715^2 .

It is not a de Polignac number, because 202012101000121 - 2¹ = 202012101000119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202012101000821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349501904556 + ... + 349501905133.

Almost surely, 2^{202012101000121} is an apocalyptic number.

It is an amenable number.

202012101000121 is a deficient number, since it is larger than the sum of its proper divisors (12582068574709).

202012101000121 is an equidigital number, since it uses as much as digits as its factorization.

202012101000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699003809723 (or 699003809706 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202012101000121 its reverse (121000101210202), we get a palindrome (323012202210323).

The spelling of 202012101000121 in words is "two hundred two trillion, twelve billion, one hundred one million, one hundred twenty-one", and thus it is an aban number.