202202221261 has 2 divisors, whose sum is σ = 202202221262. Its totient is φ = 202202221260.

The previous prime is 202202221259. The next prime is 202202221297. The reversal of 202202221261 is 162122202202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135221675625 + 66980545636 = 367725^2 + 258806^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202221261 - 2¹ = 202202221259 is a prime.

Together with 202202221259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202221061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101110630 + 101101110631.

It is an arithmetic number, because the mean of its divisors is an integer number (101101110631).

Almost surely, 2^202202221261 is an apocalyptic number.

It is an amenable number.

202202221261 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202221261 is an equidigital number, since it uses as much as digits as its factorization.

202202221261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 202202221261 its reverse (162122202202), we get a palindrome (364324423463).

The spelling of 202202221261 in words is "two hundred two billion, two hundred two million, two hundred twenty-one thousand, two hundred sixty-one".