12213009 has 6 divisors (see below), whose sum is σ = 17641026. Its totient is φ = 8142000.

The previous prime is 12213007. The next prime is 12213013. The reversal of 12213009 is 90031221.

It is a happy number.

12213009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 1617984 = 3255^2 + 1272^2 .

It is not a de Polignac number, because 12213009 - 2¹ = 12213007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212982 and 12213000.

It is not an unprimeable number, because it can be changed into a prime (12213001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678492 + ... + 678509.

It is an arithmetic number, because the mean of its divisors is an integer number (2940171).

Almost surely, 2^12213009 is an apocalyptic number.

It is an amenable number.

12213009 is a deficient number, since it is larger than the sum of its proper divisors (5428017).

12213009 is a wasteful number, since it uses less digits than its factorization.

12213009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357007 (or 1357004 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12213009 is about 3494.7115760818. The cubic root of 12213009 is about 230.2895471193.

It can be divided in two parts, 122 and 13009, that added together give a palindrome (13131).

The spelling of 12213009 in words is "twelve million, two hundred thirteen thousand, nine".