12215211 has 8 divisors (see below), whose sum is σ = 16303104. Its totient is φ = 8135400.

The previous prime is 12215201. The next prime is 12215219. The reversal of 12215211 is 11251221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12215211 - 2⁵ = 12215179 is a prime.

It is a super-2 number, since 2×12215211² = 298422759549042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12215219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4810 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (2037888).

Almost surely, 2^12215211 is an apocalyptic number.

12215211 is a deficient number, since it is larger than the sum of its proper divisors (4087893).

12215211 is a wasteful number, since it uses less digits than its factorization.

12215211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041.

The product of its digits is 40, while the sum is 15.

The square root of 12215211 is about 3495.0266093408. The cubic root of 12215211 is about 230.3033866546.

Adding to 12215211 its reverse (11251221), we get a palindrome (23466432).

The spelling of 12215211 in words is "twelve million, two hundred fifteen thousand, two hundred eleven".