12220013 has 4 divisors (see below), whose sum is σ = 13160028. Its totient is φ = 11280000.

The previous prime is 12220003. The next prime is 12220031. The reversal of 12220013 is 31002221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31002221 = 71 ⋅436651.

It can be written as a sum of positive squares in 2 ways, for example, as 537289 + 11682724 = 733^2 + 3418^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220013 - 2⁴ = 12219997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12219976 and 12220003.

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 3 ways as a sum of consecutive naturals, for example, 469988 + ... + 470013.

It is an arithmetic number, because the mean of its divisors is an integer number (3290007).

Almost surely, 2^12220013 is an apocalyptic number.

12220013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12220013 is a deficient number, since it is larger than the sum of its proper divisors (940015).

12220013 is an equidigital number, since it uses as much as digits as its factorization.

12220013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940014.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12220013 is about 3495.7135180103. The cubic root of 12220013 is about 230.3335613817. Note that the first 3 decimals are identical.

Adding to 12220013 its reverse (31002221), we get a palindrome (43222234).

The spelling of 12220013 in words is "twelve million, two hundred twenty thousand, thirteen".