121112291 has 2 divisors, whose sum is σ = 121112292. Its totient is φ = 121112290.

The previous prime is 121112287. The next prime is 121112311. The reversal of 121112291 is 192211121.

It is an a-pointer prime, because the next prime (121112311) can be obtained adding 121112291 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121112291 - 2² = 121112287 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121112281) 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, 60556145 + 60556146.

It is an arithmetic number, because the mean of its divisors is an integer number (60556146).

Almost surely, 2^121112291 is an apocalyptic number.

121112291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112291 is an equidigital number, since it uses as much as digits as its factorization.

121112291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 20.

The square root of 121112291 is about 11005.1029527215. The cubic root of 121112291 is about 494.7617000783.

The spelling of 121112291 in words is "one hundred twenty-one million, one hundred twelve thousand, two hundred ninety-one".