1222012091 has 2 divisors, whose sum is σ = 1222012092. Its totient is φ = 1222012090.

The previous prime is 1222012081. The next prime is 1222012123. The reversal of 1222012091 is 1902102221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1902102221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222012091 - 2¹⁰ = 1222011067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611006045 + 611006046.

It is an arithmetic number, because the mean of its divisors is an integer number (611006046).

Almost surely, 2^1222012091 is an apocalyptic number.

1222012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222012091 is an equidigital number, since it uses as much as digits as its factorization.

1222012091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1222012091 is about 34957.2895259344. The cubic root of 1222012091 is about 1069.1168334769.

The spelling of 1222012091 in words is "one billion, two hundred twenty-two million, twelve thousand, ninety-one".