12721431116 has 12 divisors (see below), whose sum is σ = 22263302880. Its totient is φ = 6360487440.

The previous prime is 12721431113. The next prime is 12721431119. The reversal of 12721431116 is 61113412721.

It is an interprime number because it is at equal distance from previous prime (12721431113) and next prime (12721431119).

It is not an unprimeable number, because it can be changed into a prime (12721431113) 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, 161405 + ... + 226923.

It is an arithmetic number, because the mean of its divisors is an integer number (1855275240).

Almost surely, 2^12721431116 is an apocalyptic number.

It is an amenable number.

12721431116 is a deficient number, since it is larger than the sum of its proper divisors (9541871764).

12721431116 is a wasteful number, since it uses less digits than its factorization.

12721431116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114064 (or 114062 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

Adding to 12721431116 its reverse (61113412721), we get a palindrome (73834843837).

The spelling of 12721431116 in words is "twelve billion, seven hundred twenty-one million, four hundred thirty-one thousand, one hundred sixteen".