202101010121 has 16 divisors (see below), whose sum is σ = 221539101840. Its totient is φ = 183511910400.

The previous prime is 202101010081. The next prime is 202101010169. The reversal of 202101010121 is 121010101202.

202101010121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 10072129600 + 192028880521 = 100360^2 + 438211^2 .

It is a cyclic number.

It is not a de Polignac number, because 202101010121 - 2¹⁴ = 202100993737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202101010621) 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 15 ways as a sum of consecutive naturals, for example, 483845 + ... + 798941.

It is an arithmetic number, because the mean of its divisors is an integer number (13846193865).

Almost surely, 2^202101010121 is an apocalyptic number.

It is an amenable number.

202101010121 is a deficient number, since it is larger than the sum of its proper divisors (19438091719).

202101010121 is a wasteful number, since it uses less digits than its factorization.

202101010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316444.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202101010121 its reverse (121010101202), we get a palindrome (323111111323).

The spelling of 202101010121 in words is "two hundred two billion, one hundred one million, ten thousand, one hundred twenty-one".