112122991 has 2 divisors, whose sum is σ = 112122992. Its totient is φ = 112122990.

The previous prime is 112122943. The next prime is 112123027. The reversal of 112122991 is 199221211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112122991 is a prime.

It is a super-2 number, since 2×112122991² = 25143130221572162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112122911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56061495 + 56061496.

It is an arithmetic number, because the mean of its divisors is an integer number (56061496).

Almost surely, 2^112122991 is an apocalyptic number.

112122991 is a deficient number, since it is larger than the sum of its proper divisors (1).

112122991 is an equidigital number, since it uses as much as digits as its factorization.

112122991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 28.

The square root of 112122991 is about 10588.8144284429. The cubic root of 112122991 is about 482.2048322209.

The spelling of 112122991 in words is "one hundred twelve million, one hundred twenty-two thousand, nine hundred ninety-one".