202201020022121 has 4 divisors (see below), whose sum is σ = 202201249707600. Its totient is φ = 202200790336644.

The previous prime is 202201020022081. The next prime is 202201020022139. The reversal of 202201020022121 is 121220020102202.

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 a cyclic number.

It is not a de Polignac number, because 202201020022121 - 2²⁶ = 202200952913257 is a prime.

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 202201020022121.

It is not an unprimeable number, because it can be changed into a prime (202201020622121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113517131 + ... + 115284608.

It is an arithmetic number, because the mean of its divisors is an integer number (50550312426900).

Almost surely, 2^{202201020022121} is an apocalyptic number.

It is an amenable number.

202201020022121 is a deficient number, since it is larger than the sum of its proper divisors (229685479).

202201020022121 is an equidigital number, since it uses as much as digits as its factorization.

202201020022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229685478.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202201020022121 its reverse (121220020102202), we get a palindrome (323421040124323).

The spelling of 202201020022121 in words is "two hundred two trillion, two hundred one billion, twenty million, twenty-two thousand, one hundred twenty-one".