112201221991 has 2 divisors, whose sum is σ = 112201221992. Its totient is φ = 112201221990.

The previous prime is 112201221989. The next prime is 112201222019. The reversal of 112201221991 is 199122102211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 112201221991 - 2¹ = 112201221989 is a prime.

It is a super-2 number, since 2×112201221991² (a number of 23 digits) contains 22 as substring.

Together with 112201221989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112201221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56100610995 + 56100610996.

It is an arithmetic number, because the mean of its divisors is an integer number (56100610996).

Almost surely, 2^112201221991 is an apocalyptic number.

112201221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

112201221991 is an equidigital number, since it uses as much as digits as its factorization.

112201221991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 112201221991 in words is "one hundred twelve billion, two hundred one million, two hundred twenty-one thousand, nine hundred ninety-one".