12217008346 has 4 divisors (see below), whose sum is σ = 18325512522. Its totient is φ = 6108504172.

The previous prime is 12217008343. The next prime is 12217008347. The reversal of 12217008346 is 64380071221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11883398121 + 333610225 = 109011^2 + 18265^2 .

It is not an unprimeable number, because it can be changed into a prime (12217008343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3054252085 + ... + 3054252088.

Almost surely, 2^12217008346 is an apocalyptic number.

12217008346 is a deficient number, since it is larger than the sum of its proper divisors (6108504176).

12217008346 is an equidigital number, since it uses as much as digits as its factorization.

12217008346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108504175.

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 12217008346 its reverse (64380071221), we get a palindrome (76597079567).

The spelling of 12217008346 in words is "twelve billion, two hundred seventeen million, eight thousand, three hundred forty-six".