202203210121 has 4 divisors (see below), whose sum is σ = 220585320144. Its totient is φ = 183821100100.

The previous prime is 202203210101. The next prime is 202203210151. The reversal of 202203210121 is 121012302202.

It is a happy number.

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.

It is not a de Polignac number, because 202203210121 - 2⁷ = 202203209993 is a prime.

It is a super-2 number, since 2×202203210121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202203210095 and 202203210104.

It is not an unprimeable number, because it can be changed into a prime (202203210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9191054995 + ... + 9191055016.

It is an arithmetic number, because the mean of its divisors is an integer number (55146330036).

Almost surely, 2^202203210121 is an apocalyptic number.

It is an amenable number.

202203210121 is a deficient number, since it is larger than the sum of its proper divisors (18382110023).

202203210121 is a wasteful number, since it uses less digits than its factorization.

202203210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18382110022.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202203210121 its reverse (121012302202), we get a palindrome (323215512323).

The spelling of 202203210121 in words is "two hundred two billion, two hundred three million, two hundred ten thousand, one hundred twenty-one".