1200022091 has 2 divisors, whose sum is σ = 1200022092. Its totient is φ = 1200022090.

The previous prime is 1200022081. The next prime is 1200022099. The reversal of 1200022091 is 1902200021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1200022091 - 2¹⁸ = 1199759947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200022099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600011045 + 600011046.

It is an arithmetic number, because the mean of its divisors is an integer number (600011046).

Almost surely, 2^1200022091 is an apocalyptic number.

1200022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200022091 is an equidigital number, since it uses as much as digits as its factorization.

1200022091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1200022091 is about 34641.3350060300. The cubic root of 1200022091 is about 1062.6650900288.

The spelling of 1200022091 in words is "one billion, two hundred million, twenty-two thousand, ninety-one".