202221211121 has 8 divisors (see below), whose sum is σ = 206872027560. Its totient is φ = 197621223552.

The previous prime is 202221211111. The next prime is 202221211151. The reversal of 202221211121 is 121112122202.

It can be written as a sum of positive squares in 4 ways, for example, as 49468432225 + 152752778896 = 222415^2 + 390836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202221211121 - 2¹⁰ = 202221210097 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 202221211121.

It is not an unprimeable number, because it can be changed into a prime (202221211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12699170 + ... + 12715083.

It is an arithmetic number, because the mean of its divisors is an integer number (25859003445).

Almost surely, 2^202221211121 is an apocalyptic number.

It is an amenable number.

202221211121 is a deficient number, since it is larger than the sum of its proper divisors (4650816439).

202221211121 is a wasteful number, since it uses less digits than its factorization.

202221211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25414435.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202221211121 its reverse (121112122202), we get a palindrome (323333333323).

The spelling of 202221211121 in words is "two hundred two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".