1001222197 has 2 divisors, whose sum is σ = 1001222198. Its totient is φ = 1001222196.

The previous prime is 1001222179. The next prime is 1001222207. The reversal of 1001222197 is 7912221001.

Together with previous prime (1001222179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 857845521 + 143376676 = 29289^2 + 11974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001222197 - 2¹¹ = 1001220149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001222107) 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, 500611098 + 500611099.

It is an arithmetic number, because the mean of its divisors is an integer number (500611099).

Almost surely, 2^1001222197 is an apocalyptic number.

It is an amenable number.

1001222197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222197 is an equidigital number, since it uses as much as digits as its factorization.

1001222197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1001222197 is about 31642.0953320099. The cubic root of 1001222197 is about 1000.4072331387.

Adding to 1001222197 its reverse (7912221001), we get a palindrome (8913443198).

The spelling of 1001222197 in words is "one billion, one million, two hundred twenty-two thousand, one hundred ninety-seven".