12424021091 has 2 divisors, whose sum is σ = 12424021092. Its totient is φ = 12424021090.

The previous prime is 12424021069. The next prime is 12424021151. The reversal of 12424021091 is 19012042421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12424021091 is a prime.

It is a super-2 number, since 2×12424021091² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12424021091.

It is not a weakly prime, because it can be changed into another prime (12424021391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6212010545 + 6212010546.

It is an arithmetic number, because the mean of its divisors is an integer number (6212010546).

Almost surely, 2^12424021091 is an apocalyptic number.

12424021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12424021091 is an equidigital number, since it uses as much as digits as its factorization.

12424021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 12424021091 in words is "twelve billion, four hundred twenty-four million, twenty-one thousand, ninety-one".