222722610661 has 2 divisors, whose sum is σ = 222722610662. Its totient is φ = 222722610660.

The previous prime is 222722610659. The next prime is 222722610743. The reversal of 222722610661 is 166016227222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204204572100 + 18518038561 = 451890^2 + 136081^2 .

It is a cyclic number.

It is not a de Polignac number, because 222722610661 - 2¹ = 222722610659 is a prime.

It is a super-2 number, since 2×222722610661² (a number of 23 digits) contains 22 as substring.

Together with 222722610659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 222722610661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222722610631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111361305330 + 111361305331.

It is an arithmetic number, because the mean of its divisors is an integer number (111361305331).

Almost surely, 2^222722610661 is an apocalyptic number.

It is an amenable number.

222722610661 is a deficient number, since it is larger than the sum of its proper divisors (1).

222722610661 is an equidigital number, since it uses as much as digits as its factorization.

222722610661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

Adding to 222722610661 its reverse (166016227222), we get a palindrome (388738837883).

The spelling of 222722610661 in words is "two hundred twenty-two billion, seven hundred twenty-two million, six hundred ten thousand, six hundred sixty-one".