1222985311 has 2 divisors, whose sum is σ = 1222985312. Its totient is φ = 1222985310.

The previous prime is 1222985249. The next prime is 1222985347. The reversal of 1222985311 is 1135892221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1135892221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222985311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222985381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611492655 + 611492656.

It is an arithmetic number, because the mean of its divisors is an integer number (611492656).

Almost surely, 2^1222985311 is an apocalyptic number.

1222985311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222985311 is an equidigital number, since it uses as much as digits as its factorization.

1222985311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 1222985311 is about 34971.2068850933. The cubic root of 1222985311 is about 1069.4005758385.

The spelling of 1222985311 in words is "one billion, two hundred twenty-two million, nine hundred eighty-five thousand, three hundred eleven".