12226423891 has 4 divisors (see below), whose sum is σ = 13337916984. Its totient is φ = 11114930800.

The previous prime is 12226423889. The next prime is 12226423903. The reversal of 12226423891 is 19832462221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12226423891 - 2¹ = 12226423889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12226423691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555746530 + ... + 555746551.

It is an arithmetic number, because the mean of its divisors is an integer number (3334479246).

Almost surely, 2^12226423891 is an apocalyptic number.

12226423891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12226423891 is a deficient number, since it is larger than the sum of its proper divisors (1111493093).

12226423891 is a wasteful number, since it uses less digits than its factorization.

12226423891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111493092.

The product of its digits is 82944, while the sum is 40.

The spelling of 12226423891 in words is "twelve billion, two hundred twenty-six million, four hundred twenty-three thousand, eight hundred ninety-one".