12740404721 has 24 divisors (see below), whose sum is σ = 14276207232. Its totient is φ = 11359172000.

The previous prime is 12740404711. The next prime is 12740404751.

12740404721 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-12740404721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12740404711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1302776 + ... + 1312518.

It is an arithmetic number, because the mean of its divisors is an integer number (594841968).

Almost surely, 2^12740404721 is an apocalyptic number.

12740404721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12740404721 is a deficient number, since it is larger than the sum of its proper divisors (1535802511).

12740404721 is a wasteful number, since it uses less digits than its factorization.

12740404721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9973 (or 9962 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The spelling of 12740404721 in words is "twelve billion, seven hundred forty million, four hundred four thousand, seven hundred twenty-one".