12201566 has 16 divisors (see below), whose sum is σ = 19773600. Its totient is φ = 5613408.

The previous prime is 12201557. The next prime is 12201583. The reversal of 12201566 is 66510221.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10880 + ... + 11948.

It is an arithmetic number, because the mean of its divisors is an integer number (1235850).

Almost surely, 2^12201566 is an apocalyptic number.

12201566 is a deficient number, since it is larger than the sum of its proper divisors (7572034).

12201566 is a wasteful number, since it uses less digits than its factorization.

12201566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12201566 is about 3493.0740043692. The cubic root of 12201566 is about 230.2176012476.

Adding to 12201566 its reverse (66510221), we get a palindrome (78711787).

The spelling of 12201566 in words is "twelve million, two hundred one thousand, five hundred sixty-six".