12721440112 has 10 divisors (see below), whose sum is σ = 24647790248. Its totient is φ = 6360720048.

The previous prime is 12721440103. The next prime is 12721440113. The reversal of 12721440112 is 21104412721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721440113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397544988 + ... + 397545019.

Almost surely, 2^12721440112 is an apocalyptic number.

It is an amenable number.

12721440112 is a deficient number, since it is larger than the sum of its proper divisors (11926350136).

12721440112 is an equidigital number, since it uses as much as digits as its factorization.

12721440112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795090015 (or 795090009 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 12721440112 its reverse (21104412721), we get a palindrome (33825852833).

The spelling of 12721440112 in words is "twelve billion, seven hundred twenty-one million, four hundred forty thousand, one hundred twelve".