12227978887 has 2 divisors, whose sum is σ = 12227978888. Its totient is φ = 12227978886.

The previous prime is 12227978881. The next prime is 12227978921. The reversal of 12227978887 is 78887972221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12227978887 - 2⁷ = 12227978759 is a prime.

It is a super-3 number, since 3×12227978887³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12227978881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113989443 + 6113989444.

It is an arithmetic number, because the mean of its divisors is an integer number (6113989444).

Almost surely, 2^12227978887 is an apocalyptic number.

12227978887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12227978887 is an equidigital number, since it uses as much as digits as its factorization.

12227978887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12644352, while the sum is 61.

The spelling of 12227978887 in words is "twelve billion, two hundred twenty-seven million, nine hundred seventy-eight thousand, eight hundred eighty-seven".