12201718 has 4 divisors (see below), whose sum is σ = 18302580. Its totient is φ = 6100858.

The previous prime is 12201703. The next prime is 12201719. The reversal of 12201718 is 81710221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81710221 = 59 ⋅1384919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3050428 + ... + 3050431.

It is an arithmetic number, because the mean of its divisors is an integer number (4575645).

Almost surely, 2^12201718 is an apocalyptic number.

12201718 is a deficient number, since it is larger than the sum of its proper divisors (6100862).

12201718 is an equidigital number, since it uses as much as digits as its factorization.

12201718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100861.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 12201718 is about 3493.0957616418. The cubic root of 12201718 is about 230.2185572158.

Adding to 12201718 its reverse (81710221), we get a palindrome (93911939).

The spelling of 12201718 in words is "twelve million, two hundred one thousand, seven hundred eighteen".