202221012212221 has 8 divisors (see below), whose sum is σ = 206046627259320. Its totient is φ = 198395772137472.

The previous prime is 202221012212123. The next prime is 202221012212249. The reversal of 202221012212221 is 122212210122202.

It can be written as a sum of positive squares in 4 ways, for example, as 73082220806596 + 129138791405625 = 8548814^2 + 11363925^2 .

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

It is not a de Polignac number, because 202221012212221 - 2¹⁵ = 202221012179453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202221012212192 and 202221012212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221012222221) 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, 92654176 + ... + 94811593.

It is an arithmetic number, because the mean of its divisors is an integer number (25755828407415).

Almost surely, 2^{202221012212221} is an apocalyptic number.

It is an amenable number.

202221012212221 is a deficient number, since it is larger than the sum of its proper divisors (3825615047099).

202221012212221 is a wasteful number, since it uses less digits than its factorization.

202221012212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187486175.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 202221012212221 its reverse (122212210122202), we get a palindrome (324433222334423).

The spelling of 202221012212221 in words is "two hundred two trillion, two hundred twenty-one billion, twelve million, two hundred twelve thousand, two hundred twenty-one".