12947102321 has 2 divisors, whose sum is σ = 12947102322. Its totient is φ = 12947102320.

The previous prime is 12947102281. The next prime is 12947102383. The reversal of 12947102321 is 12320174921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7911213025 + 5035889296 = 88945^2 + 70964^2 .

It is a cyclic number.

It is not a de Polignac number, because 12947102321 - 2²⁶ = 12879993457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12947102821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473551160 + 6473551161.

It is an arithmetic number, because the mean of its divisors is an integer number (6473551161).

Almost surely, 2^12947102321 is an apocalyptic number.

It is an amenable number.

12947102321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947102321 is an equidigital number, since it uses as much as digits as its factorization.

12947102321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 12947102321 in words is "twelve billion, nine hundred forty-seven million, one hundred two thousand, three hundred twenty-one".