12228061272 has 32 divisors (see below), whose sum is σ = 34937318400. Its totient is φ = 3493731744.

The previous prime is 12228061253. The next prime is 12228061273. The reversal of 12228061272 is 27216082221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228061273) 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, 36392872 + ... + 36393207.

It is an arithmetic number, because the mean of its divisors is an integer number (1091791200).

Almost surely, 2^12228061272 is an apocalyptic number.

12228061272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12228061272 is an abundant number, since it is smaller than the sum of its proper divisors (22709257128).

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

12228061272 is a wasteful number, since it uses less digits than its factorization.

12228061272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72786095 (or 72786091 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 12228061272 in words is "twelve billion, two hundred twenty-eight million, sixty-one thousand, two hundred seventy-two".