12220005 has 16 divisors (see below), whose sum is σ = 22345344. Its totient is φ = 5586240.

The previous prime is 12220003. The next prime is 12220031. The reversal of 12220005 is 50002221.

It is not a de Polignac number, because 12220005 - 2¹ = 12220003 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58086 + ... + 58295.

It is an arithmetic number, because the mean of its divisors is an integer number (1396584).

Almost surely, 2^12220005 is an apocalyptic number.

12220005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12220005 is a deficient number, since it is larger than the sum of its proper divisors (10125339).

12220005 is a wasteful number, since it uses less digits than its factorization.

12220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116396.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 12220005 is about 3495.7123737516. The cubic root of 12220005 is about 230.3335111180. Note that the first 3 decimals are identical.

Adding to 12220005 its reverse (50002221), we get a palindrome (62222226).

The spelling of 12220005 in words is "twelve million, two hundred twenty thousand, five".