202005310121 has 8 divisors (see below), whose sum is σ = 212396766600. Its totient is φ = 191842237440.

The previous prime is 202005310099. The next prime is 202005310127. The reversal of 202005310121 is 121013500202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4390387600 + 197614922521 = 66260^2 + 444539^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 202005310121 - 2⁶ = 202005310057 is a prime.

It is a super-2 number, since 2×202005310121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202005310121.

It is not an unprimeable number, because it can be changed into a prime (202005310127) 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, 57094136 + ... + 57097673.

It is an arithmetic number, because the mean of its divisors is an integer number (26549595825).

Almost surely, 2^202005310121 is an apocalyptic number.

It is an amenable number.

202005310121 is a deficient number, since it is larger than the sum of its proper divisors (10391456479).

202005310121 is a wasteful number, since it uses less digits than its factorization.

202005310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114191899.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 202005310121 its reverse (121013500202), we get a palindrome (323018810323).

The spelling of 202005310121 in words is "two hundred two billion, five million, three hundred ten thousand, one hundred twenty-one".