1222199197 has 2 divisors, whose sum is σ = 1222199198. Its totient is φ = 1222199196.

The previous prime is 1222199189. The next prime is 1222199213. The reversal of 1222199197 is 7919912221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085636601 + 136562596 = 32949^2 + 11686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222199197 - 2³ = 1222199189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222199137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611099598 + 611099599.

It is an arithmetic number, because the mean of its divisors is an integer number (611099599).

Almost surely, 2^1222199197 is an apocalyptic number.

It is an amenable number.

1222199197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222199197 is an equidigital number, since it uses as much as digits as its factorization.

1222199197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 43.

The square root of 1222199197 is about 34959.9656321341. The cubic root of 1222199197 is about 1069.1713959391.

The spelling of 1222199197 in words is "one billion, two hundred twenty-two million, one hundred ninety-nine thousand, one hundred ninety-seven".