12213011 has 4 divisors (see below), whose sum is σ = 12234000. Its totient is φ = 12192024.

The previous prime is 12213007. The next prime is 12213013. The reversal of 12213011 is 11031221.

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

It is a cyclic number.

It is not a de Polignac number, because 12213011 - 2² = 12213007 is a prime.

It is a super-2 number, since 2×12213011² = 298315275372242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212983 and 12213001.

It is not an unprimeable number, because it can be changed into a prime (12213013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9596 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (3058500).

Almost surely, 2^12213011 is an apocalyptic number.

12213011 is a deficient number, since it is larger than the sum of its proper divisors (20989).

12213011 is an equidigital number, since it uses as much as digits as its factorization.

12213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20988.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12213011 is about 3494.7118622284. The cubic root of 12213011 is about 230.2895596900.

Adding to 12213011 its reverse (11031221), we get a palindrome (23244232).

The spelling of 12213011 in words is "twelve million, two hundred thirteen thousand, eleven".