12221006 has 32 divisors (see below), whose sum is σ = 22394880. Its totient is φ = 4888800.

The previous prime is 12220997. The next prime is 12221021. The reversal of 12221006 is 60012221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12101 + ... + 13071.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^12221006 is an apocalyptic number.

12221006 is a deficient number, since it is larger than the sum of its proper divisors (10173874).

12221006 is a wasteful number, since it uses less digits than its factorization.

12221006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12221006 is about 3495.8555462147. The cubic root of 12221006 is about 230.3398001921.

Adding to 12221006 its reverse (60012221), we get a palindrome (72233227).

The spelling of 12221006 in words is "twelve million, two hundred twenty-one thousand, six".