12213207 has 32 divisors (see below), whose sum is σ = 19215360. Its totient is φ = 7650720.

The previous prime is 12213199. The next prime is 12213221. The reversal of 12213207 is 70231221.

It is not a de Polignac number, because 12213207 - 2³ = 12213199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43953 + ... + 44229.

It is an arithmetic number, because the mean of its divisors is an integer number (600480).

Almost surely, 2^12213207 is an apocalyptic number.

12213207 is a deficient number, since it is larger than the sum of its proper divisors (7002153).

12213207 is a wasteful number, since it uses less digits than its factorization.

12213207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12213207 is about 3494.7399044850. The cubic root of 12213207 is about 230.2907916142.

Adding to 12213207 its reverse (70231221), we get a palindrome (82444428).

The spelling of 12213207 in words is "twelve million, two hundred thirteen thousand, two hundred seven".