12921712973 has 16 divisors (see below), whose sum is σ = 14101248000. Its totient is φ = 11768889600.

The previous prime is 12921712963. The next prime is 12921712997. The reversal of 12921712973 is 37921712921.

It is not a de Polignac number, because 12921712973 - 2⁴ = 12921712957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921712913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2000453 + ... + 2006901.

It is an arithmetic number, because the mean of its divisors is an integer number (881328000).

Almost surely, 2^12921712973 is an apocalyptic number.

12921712973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12921712973 is a deficient number, since it is larger than the sum of its proper divisors (1179535027).

12921712973 is a wasteful number, since it uses less digits than its factorization.

12921712973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492.

The product of its digits is 95256, while the sum is 44.

The spelling of 12921712973 in words is "twelve billion, nine hundred twenty-one million, seven hundred twelve thousand, nine hundred seventy-three".