12216662541 has 16 divisors (see below), whose sum is σ = 19051326400. Its totient is φ = 7715786544.

The previous prime is 12216662537. The next prime is 12216662567. The reversal of 12216662541 is 14526661221.

12216662541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12216662541 - 2² = 12216662537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12216662496 and 12216662505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216660541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11906566 + ... + 11907591.

It is an arithmetic number, because the mean of its divisors is an integer number (1190707900).

Almost surely, 2^12216662541 is an apocalyptic number.

It is an amenable number.

12216662541 is a deficient number, since it is larger than the sum of its proper divisors (6834663859).

12216662541 is a wasteful number, since it uses less digits than its factorization.

12216662541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23814185 (or 23814179 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 12216662541 in words is "twelve billion, two hundred sixteen million, six hundred sixty-two thousand, five hundred forty-one".