1222388911 has 2 divisors, whose sum is σ = 1222388912. Its totient is φ = 1222388910.

The previous prime is 1222388899. The next prime is 1222388917. The reversal of 1222388911 is 1198832221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222388911 - 2⁵ = 1222388879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222388917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611194455 + 611194456.

It is an arithmetic number, because the mean of its divisors is an integer number (611194456).

Almost surely, 2^1222388911 is an apocalyptic number.

1222388911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222388911 is an equidigital number, since it uses as much as digits as its factorization.

1222388911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 1222388911 is about 34962.6788304329. The cubic root of 1222388911 is about 1069.2267132416.

The spelling of 1222388911 in words is "one billion, two hundred twenty-two million, three hundred eighty-eight thousand, nine hundred eleven".