12721229068 has 144 divisors (see below), whose sum is σ = 25864473600. Its totient is φ = 5451684480.

The previous prime is 12721229057. The next prime is 12721229069. The reversal of 12721229068 is 86092212721.

It is a self number, because there is not a number n which added to its sum of digits gives 12721229068.

It is not an unprimeable number, because it can be changed into a prime (12721229069) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73533030 + ... + 73533202.

It is an arithmetic number, because the mean of its divisors is an integer number (179614400).

Almost surely, 2^12721229068 is an apocalyptic number.

It is an amenable number.

12721229068 is an abundant number, since it is smaller than the sum of its proper divisors (13143244532).

12721229068 is a wasteful number, since it uses less digits than its factorization.

12721229068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 12721229068 in words is "twelve billion, seven hundred twenty-one million, two hundred twenty-nine thousand, sixty-eight".