12271273212 has 48 divisors (see below), whose sum is σ = 31278828672. Its totient is φ = 3713465280.

The previous prime is 12271273207. The next prime is 12271273241. The reversal of 12271273212 is 21237217221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12271273212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33343 + ... + 160169.

It is an arithmetic number, because the mean of its divisors is an integer number (651642264).

Almost surely, 2^12271273212 is an apocalyptic number.

12271273212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12271273212 is an abundant number, since it is smaller than the sum of its proper divisors (19007555460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12271273212 is a wasteful number, since it uses less digits than its factorization.

12271273212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127578 (or 127576 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The spelling of 12271273212 in words is "twelve billion, two hundred seventy-one million, two hundred seventy-three thousand, two hundred twelve".