12220105 has 4 divisors (see below), whose sum is σ = 14664132. Its totient is φ = 9776080.

The previous prime is 12220081. The next prime is 12220111. The reversal of 12220105 is 50102221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2082249 + 10137856 = 1443^2 + 3184^2 .

It is not a de Polignac number, because 12220105 - 2⁹ = 12219593 is a prime.

It is a super-2 number, since 2×12220105² = 298661932422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222006 + ... + 1222015.

It is an arithmetic number, because the mean of its divisors is an integer number (3666033).

Almost surely, 2^12220105 is an apocalyptic number.

It is an amenable number.

12220105 is a deficient number, since it is larger than the sum of its proper divisors (2444027).

12220105 is an equidigital number, since it uses as much as digits as its factorization.

12220105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444026.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 12220105 is about 3495.7266769586. The cubic root of 12220105 is about 230.3341394126.

Adding to 12220105 its reverse (50102221), we get a palindrome (62322326).

The spelling of 12220105 in words is "twelve million, two hundred twenty thousand, one hundred five".