202022121101221 has 4 divisors (see below), whose sum is σ = 202163494175500. Its totient is φ = 201880748026944.

The previous prime is 202022121101167. The next prime is 202022121101287. The reversal of 202022121101221 is 122101121220202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6731585920900 + 195290535180321 = 2594530^2 + 13974639^2 .

It is a cyclic number.

It is not a de Polignac number, because 202022121101221 - 2³¹ = 202019973617573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022121101291) 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 3 ways as a sum of consecutive naturals, for example, 70686534996 + ... + 70686537853.

It is an arithmetic number, because the mean of its divisors is an integer number (50540873543875).

Almost surely, 2^{202022121101221} is an apocalyptic number.

It is an amenable number.

202022121101221 is a deficient number, since it is larger than the sum of its proper divisors (141373074279).

202022121101221 is a wasteful number, since it uses less digits than its factorization.

202022121101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141373074278.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202022121101221 its reverse (122101121220202), we get a palindrome (324123242321423).

The spelling of 202022121101221 in words is "two hundred two trillion, twenty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-one".