12908772321 has 8 divisors (see below), whose sum is σ = 17213360640. Its totient is φ = 8605016112.

The previous prime is 12908772293. The next prime is 12908772347. The reversal of 12908772321 is 12327780921.

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

It is not a de Polignac number, because 12908772321 - 2¹⁵ = 12908739553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12908772391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170881 + ... + 234558.

It is an arithmetic number, because the mean of its divisors is an integer number (2151670080).

Almost surely, 2^12908772321 is an apocalyptic number.

It is an amenable number.

12908772321 is a deficient number, since it is larger than the sum of its proper divisors (4304588319).

12908772321 is a wasteful number, since it uses less digits than its factorization.

12908772321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416055.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 12908772321 in words is "twelve billion, nine hundred eight million, seven hundred seventy-two thousand, three hundred twenty-one".