1223201191 has 2 divisors, whose sum is σ = 1223201192. Its totient is φ = 1223201190.

The previous prime is 1223201159. The next prime is 1223201197. The reversal of 1223201191 is 1911023221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223201191 - 2⁵ = 1223201159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223201197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611600595 + 611600596.

It is an arithmetic number, because the mean of its divisors is an integer number (611600596).

Almost surely, 2^1223201191 is an apocalyptic number.

1223201191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223201191 is an equidigital number, since it uses as much as digits as its factorization.

1223201191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1223201191 is about 34974.2932880709. The cubic root of 1223201191 is about 1069.4634952679.

The spelling of 1223201191 in words is "one billion, two hundred twenty-three million, two hundred one thousand, one hundred ninety-one".