12398475221 has 8 divisors (see below), whose sum is σ = 13532133888. Its totient is φ = 11265904000.

The previous prime is 12398475209. The next prime is 12398475239. The reversal of 12398475221 is 12257489321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12398475221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12398475421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247925 + ... + 293706.

It is an arithmetic number, because the mean of its divisors is an integer number (1691516736).

Almost surely, 2^12398475221 is an apocalyptic number.

12398475221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12398475221 is a deficient number, since it is larger than the sum of its proper divisors (1133658667).

12398475221 is a wasteful number, since it uses less digits than its factorization.

12398475221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543723.

The product of its digits is 241920, while the sum is 44.

The spelling of 12398475221 in words is "twelve billion, three hundred ninety-eight million, four hundred seventy-five thousand, two hundred twenty-one".