12291775919 has 2 divisors, whose sum is σ = 12291775920. Its totient is φ = 12291775918.

The previous prime is 12291775901. The next prime is 12291775921. The reversal of 12291775919 is 91957719221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12291775919 - 2²⁰ = 12290727343 is a prime.

It is a super-2 number, since 2×12291775919² (a number of 21 digits) contains 22 as substring.

Together with 12291775921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12291775939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6145887959 + 6145887960.

It is an arithmetic number, because the mean of its divisors is an integer number (6145887960).

Almost surely, 2^12291775919 is an apocalyptic number.

12291775919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12291775919 is an equidigital number, since it uses as much as digits as its factorization.

12291775919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 53.

The spelling of 12291775919 in words is "twelve billion, two hundred ninety-one million, seven hundred seventy-five thousand, nine hundred nineteen".