1112212091 has 2 divisors, whose sum is σ = 1112212092. Its totient is φ = 1112212090.

The previous prime is 1112212067. The next prime is 1112212109. The reversal of 1112212091 is 1902122111.

Together with next prime (1112212109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1112212091 - 2²² = 1108017787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1112212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556106045 + 556106046.

It is an arithmetic number, because the mean of its divisors is an integer number (556106046).

Almost surely, 2^1112212091 is an apocalyptic number.

1112212091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112212091 is an equidigital number, since it uses as much as digits as its factorization.

1112212091 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 20.

The square root of 1112212091 is about 33349.8439426634. The cubic root of 1112212091 is about 1036.0861557698.

The spelling of 1112212091 in words is "one billion, one hundred twelve million, two hundred twelve thousand, ninety-one".