12220205 has 8 divisors (see below), whose sum is σ = 14683032. Its totient is φ = 9763648.

The previous prime is 12220193. The next prime is 12220217. The reversal of 12220205 is 50202221.

It is an interprime number because it is at equal distance from previous prime (12220193) and next prime (12220217).

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 11600836 = 787^2 + 3406^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12220205 - 2¹⁶ = 12154669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12220205.

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, 6647 + ... + 8283.

It is an arithmetic number, because the mean of its divisors is an integer number (1835379).

Almost surely, 2^12220205 is an apocalyptic number.

It is an amenable number.

12220205 is a deficient number, since it is larger than the sum of its proper divisors (2462827).

12220205 is a wasteful number, since it uses less digits than its factorization.

12220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12220205 is about 3495.7409801071. The cubic root of 12220205 is about 230.3347677038.

Adding to 12220205 its reverse (50202221), we get a palindrome (62422426).

The spelling of 12220205 in words is "twelve million, two hundred twenty thousand, two hundred five".