12112222211 has 4 divisors (see below), whose sum is σ = 12638840592. Its totient is φ = 11585603832.

The previous prime is 12112222153. The next prime is 12112222219. The reversal of 12112222211 is 11222221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11222221121 = 1171 ⋅9583451.

It is a cyclic number.

It is not a de Polignac number, because 12112222211 - 2¹⁸ = 12111960067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112222211.

It is not an unprimeable number, because it can be changed into a prime (12112222219) 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, 263309156 + ... + 263309201.

It is an arithmetic number, because the mean of its divisors is an integer number (3159710148).

Almost surely, 2^12112222211 is an apocalyptic number.

12112222211 is a deficient number, since it is larger than the sum of its proper divisors (526618381).

12112222211 is an equidigital number, since it uses as much as digits as its factorization.

12112222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526618380.

The product of its digits is 64, while the sum is 17.

Adding to 12112222211 its reverse (11222221121), we get a palindrome (23334443332).

The spelling of 12112222211 in words is "twelve billion, one hundred twelve million, two hundred twenty-two thousand, two hundred eleven".