12971721670 has 8 divisors (see below), whose sum is σ = 23349099024. Its totient is φ = 5188688664.

The previous prime is 12971721569. The next prime is 12971721673. The reversal of 12971721670 is 7612717921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971721673) 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, 648586074 + ... + 648586093.

It is an arithmetic number, because the mean of its divisors is an integer number (2918637378).

Almost surely, 2^12971721670 is an apocalyptic number.

12971721670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12971721670 is a deficient number, since it is larger than the sum of its proper divisors (10377377354).

12971721670 is a wasteful number, since it uses less digits than its factorization.

12971721670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297172174.

The product of its (nonzero) digits is 74088, while the sum is 43.

The spelling of 12971721670 in words is "twelve billion, nine hundred seventy-one million, seven hundred twenty-one thousand, six hundred seventy".