202212122261 has 2 divisors, whose sum is σ = 202212122262. Its totient is φ = 202212122260.

The previous prime is 202212122239. The next prime is 202212122267. The reversal of 202212122261 is 162221212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194225304100 + 7986818161 = 440710^2 + 89369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202212122261 is a prime.

It is a super-2 number, since 2×202212122261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202212122267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101106061130 + 101106061131.

It is an arithmetic number, because the mean of its divisors is an integer number (101106061131).

Almost surely, 2^202212122261 is an apocalyptic number.

It is an amenable number.

202212122261 is a deficient number, since it is larger than the sum of its proper divisors (1).

202212122261 is an equidigital number, since it uses as much as digits as its factorization.

202212122261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 202212122261 its reverse (162221212202), we get a palindrome (364433334463).

The spelling of 202212122261 in words is "two hundred two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred sixty-one".