1222388819 has 2 divisors, whose sum is σ = 1222388820. Its totient is φ = 1222388818.

The previous prime is 1222388813. The next prime is 1222388833. The reversal of 1222388819 is 9188832221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222388819 - 2²⁰ = 1221340243 is a prime.

It is a super-2 number, since 2×1222388819² = 2988468849632429522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222388819.

It is not a weakly prime, because it can be changed into another prime (1222388813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611194409 + 611194410.

It is an arithmetic number, because the mean of its divisors is an integer number (611194410).

Almost surely, 2^1222388819 is an apocalyptic number.

1222388819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222388819 is an equidigital number, since it uses as much as digits as its factorization.

1222388819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 44.

The square root of 1222388819 is about 34962.6775147442. The cubic root of 1222388819 is about 1069.2266864174.

The spelling of 1222388819 in words is "one billion, two hundred twenty-two million, three hundred eighty-eight thousand, eight hundred nineteen".