1222542091 has 2 divisors, whose sum is σ = 1222542092. Its totient is φ = 1222542090.

The previous prime is 1222542031. The next prime is 1222542103. The reversal of 1222542091 is 1902452221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222542091 - 2⁷ = 1222541963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222542011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611271045 + 611271046.

It is an arithmetic number, because the mean of its divisors is an integer number (611271046).

Almost surely, 2^1222542091 is an apocalyptic number.

1222542091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222542091 is an equidigital number, since it uses as much as digits as its factorization.

1222542091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1222542091 is about 34964.8693834254. The cubic root of 1222542091 is about 1069.2713736890.

The spelling of 1222542091 in words is "one billion, two hundred twenty-two million, five hundred forty-two thousand, ninety-one".