12274278221 has 4 divisors (see below), whose sum is σ = 12280128000. Its totient is φ = 12268428444.

The previous prime is 12274278197. The next prime is 12274278223. The reversal of 12274278221 is 12287247221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12274278221 - 2⁶ = 12274278157 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 (12274278223) 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, 2921741 + ... + 2925938.

It is an arithmetic number, because the mean of its divisors is an integer number (3070032000).

Almost surely, 2^12274278221 is an apocalyptic number.

It is an amenable number.

12274278221 is a deficient number, since it is larger than the sum of its proper divisors (5849779).

12274278221 is an equidigital number, since it uses as much as digits as its factorization.

12274278221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849778.

The product of its digits is 50176, while the sum is 38.

The spelling of 12274278221 in words is "twelve billion, two hundred seventy-four million, two hundred seventy-eight thousand, two hundred twenty-one".