222120122261 has 2 divisors, whose sum is σ = 222120122262. Its totient is φ = 222120122260.

The previous prime is 222120122183. The next prime is 222120122311. The reversal of 222120122261 is 162221021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186283739236 + 35836383025 = 431606^2 + 189305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120122261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222120112261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060061130 + 111060061131.

It is an arithmetic number, because the mean of its divisors is an integer number (111060061131).

Almost surely, 2^222120122261 is an apocalyptic number.

It is an amenable number.

222120122261 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120122261 is an equidigital number, since it uses as much as digits as its factorization.

222120122261 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 23.

Adding to 222120122261 its reverse (162221021222), we get a palindrome (384341143483).

The spelling of 222120122261 in words is "two hundred twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, two hundred sixty-one".