12216975287641 has 2 divisors, whose sum is σ = 12216975287642. Its totient is φ = 12216975287640.

The previous prime is 12216975287617. The next prime is 12216975287677. The reversal of 12216975287641 is 14678257961221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9686317921225 + 2530657366416 = 3112285^2 + 1590804^2 .

It is a cyclic number.

It is not a de Polignac number, because 12216975287641 - 2¹⁵ = 12216975254873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12216975287641.

It is not a weakly prime, because it can be changed into another prime (12216975287611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108487643820 + 6108487643821.

It is an arithmetic number, because the mean of its divisors is an integer number (6108487643821).

Almost surely, 2^{12216975287641} is an apocalyptic number.

It is an amenable number.

12216975287641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216975287641 is an equidigital number, since it uses as much as digits as its factorization.

12216975287641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 61.

The spelling of 12216975287641 in words is "twelve trillion, two hundred sixteen billion, nine hundred seventy-five million, two hundred eighty-seven thousand, six hundred forty-one".