1111112291 has 2 divisors, whose sum is σ = 1111112292. Its totient is φ = 1111112290.

The previous prime is 1111112287. The next prime is 1111112297. The reversal of 1111112291 is 1922111111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1922111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111112291 - 2² = 1111112287 is a prime.

It is a super-2 number, since 2×1111112291² = 2469141046422537362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111112297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555556145 + 555556146.

It is an arithmetic number, because the mean of its divisors is an integer number (555556146).

Almost surely, 2^1111112291 is an apocalyptic number.

1111112291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111112291 is an equidigital number, since it uses as much as digits as its factorization.

1111112291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 20.

The square root of 1111112291 is about 33333.3510316620. The cubic root of 1111112291 is about 1035.7445352701.

The spelling of 1111112291 in words is "one billion, one hundred eleven million, one hundred twelve thousand, two hundred ninety-one".