12112221011 has 16 divisors (see below), whose sum is σ = 13284864000. Its totient is φ = 10951617600.

The previous prime is 12112220993. The next prime is 12112221029. The reversal of 12112221011 is 11012221121.

It is an interprime number because it is at equal distance from previous prime (12112220993) and next prime (12112221029).

It is a de Polignac number, because none of the positive numbers 2^k-12112221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2603015 + ... + 2607663.

It is an arithmetic number, because the mean of its divisors is an integer number (830304000).

Almost surely, 2^12112221011 is an apocalyptic number.

12112221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12112221011 is a deficient number, since it is larger than the sum of its proper divisors (1172642989).

12112221011 is a wasteful number, since it uses less digits than its factorization.

12112221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12112221011 its reverse (11012221121), we get a palindrome (23124442132).

It can be divided in two parts, 1211 and 2221011, that added together give a palindrome (2222222).

The spelling of 12112221011 in words is "twelve billion, one hundred twelve million, two hundred twenty-one thousand, eleven".