1121120291 has 2 divisors, whose sum is σ = 1121120292. Its totient is φ = 1121120290.

The previous prime is 1121120219. The next prime is 1121120293. The reversal of 1121120291 is 1920211211.

Together with previous prime (1121120219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1920211211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121120291 - 2²² = 1116925987 is a prime.

Together with 1121120293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1121120293) 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, 560560145 + 560560146.

It is an arithmetic number, because the mean of its divisors is an integer number (560560146).

Almost surely, 2^1121120291 is an apocalyptic number.

1121120291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121120291 is an equidigital number, since it uses as much as digits as its factorization.

1121120291 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 1121120291 is about 33483.1344261555. The cubic root of 1121120291 is about 1038.8449612005.

The spelling of 1121120291 in words is "one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred ninety-one".