12387895221 has 32 divisors (see below), whose sum is σ = 17893774080. Its totient is φ = 7578031104.

The previous prime is 12387895211. The next prime is 12387895237. The reversal of 12387895221 is 12259878321.

It is not a de Polignac number, because 12387895221 - 2⁹ = 12387894709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387895211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5111416 + ... + 5113838.

It is an arithmetic number, because the mean of its divisors is an integer number (559180440).

Almost surely, 2^12387895221 is an apocalyptic number.

It is an amenable number.

12387895221 is a deficient number, since it is larger than the sum of its proper divisors (5505878859).

12387895221 is a wasteful number, since it uses less digits than its factorization.

12387895221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165.

The product of its digits is 483840, while the sum is 48.

The spelling of 12387895221 in words is "twelve billion, three hundred eighty-seven million, eight hundred ninety-five thousand, two hundred twenty-one".