202002102121 has 4 divisors (see below), whose sum is σ = 202003087744. Its totient is φ = 202001116500.

The previous prime is 202002102097. The next prime is 202002102143. The reversal of 202002102121 is 121201200202.

It is a happy number.

202002102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 202002102121 - 2¹¹ = 202002100073 is a prime.

It is a super-2 number, since 2×202002102121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202002102151) 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 3 ways as a sum of consecutive naturals, for example, 56805 + ... + 638146.

It is an arithmetic number, because the mean of its divisors is an integer number (50500771936).

Almost surely, 2^202002102121 is an apocalyptic number.

It is an amenable number.

202002102121 is a deficient number, since it is larger than the sum of its proper divisors (985623).

202002102121 is an equidigital number, since it uses as much as digits as its factorization.

202002102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985622.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202002102121 its reverse (121201200202), we get a palindrome (323203302323).

The spelling of 202002102121 in words is "two hundred two billion, two million, one hundred two thousand, one hundred twenty-one".