202221102120221 has 16 divisors (see below), whose sum is σ = 203363550105600. Its totient is φ = 201080430028800.

The previous prime is 202221102120187. The next prime is 202221102120229. The reversal of 202221102120221 is 122021201122202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202221102120221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202221102120193 and 202221102120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221102120229) 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 15 ways as a sum of consecutive naturals, for example, 2409618341 + ... + 2409702261.

It is an arithmetic number, because the mean of its divisors is an integer number (12710221881600).

Almost surely, 2^{202221102120221} is an apocalyptic number.

It is an amenable number.

202221102120221 is a deficient number, since it is larger than the sum of its proper divisors (1142447985379).

202221102120221 is a wasteful number, since it uses less digits than its factorization.

202221102120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94340.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202221102120221 its reverse (122021201122202), we get a palindrome (324242303242423).

The spelling of 202221102120221 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".