12970947721 has 16 divisors (see below), whose sum is σ = 13993450240. Its totient is φ = 11983340880.

The previous prime is 12970947701. The next prime is 12970947761. The reversal of 12970947721 is 12774907921.

It is a cyclic number.

It is not a de Polignac number, because 12970947721 - 2⁷ = 12970947593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12970947701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512986 + ... + 537676.

It is an arithmetic number, because the mean of its divisors is an integer number (874590640).

Almost surely, 2^12970947721 is an apocalyptic number.

It is an amenable number.

12970947721 is a deficient number, since it is larger than the sum of its proper divisors (1022502519).

12970947721 is a wasteful number, since it uses less digits than its factorization.

12970947721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25396.

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 12970947721 in words is "twelve billion, nine hundred seventy million, nine hundred forty-seven thousand, seven hundred twenty-one".