12112211331 has 48 divisors (see below), whose sum is σ = 19838407680. Its totient is φ = 7056106560.

The previous prime is 12112211273. The next prime is 12112211347. The reversal of 12112211331 is 13311221121.

12112211331 is a `hidden beast` number, since 12 + 112 + 211 + 331 = 666.

It is not a de Polignac number, because 12112211331 - 2¹³ = 12112203139 is a prime.

It is a super-2 number, since 2×12112211331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12112211231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284110 + ... + 323948.

It is an arithmetic number, because the mean of its divisors is an integer number (413300160).

Almost surely, 2^12112211331 is an apocalyptic number.

12112211331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12112211331 is a deficient number, since it is larger than the sum of its proper divisors (7726196349).

12112211331 is a wasteful number, since it uses less digits than its factorization.

12112211331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39976 (or 39973 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12112211331 its reverse (13311221121), we get a palindrome (25423432452).

The spelling of 12112211331 in words is "twelve billion, one hundred twelve million, two hundred eleven thousand, three hundred thirty-one".