12015222211 has 4 divisors (see below), whose sum is σ = 12039693624. Its totient is φ = 11990750800.

The previous prime is 12015222187. The next prime is 12015222221. The reversal of 12015222211 is 11222251021.

It is a happy number.

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 12015222211 - 2²⁹ = 11478351299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12015222221) 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, 12234970 + ... + 12235951.

It is an arithmetic number, because the mean of its divisors is an integer number (3009923406).

Almost surely, 2^12015222211 is an apocalyptic number.

12015222211 is a deficient number, since it is larger than the sum of its proper divisors (24471413).

12015222211 is an equidigital number, since it uses as much as digits as its factorization.

12015222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24471412.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 12015222211 its reverse (11222251021), we get a palindrome (23237473232).

The spelling of 12015222211 in words is "twelve billion, fifteen million, two hundred twenty-two thousand, two hundred eleven".