12112211031 has 4 divisors (see below), whose sum is σ = 16149614712. Its totient is φ = 8074807352.

The previous prime is 12112210997. The next prime is 12112211047. The reversal of 12112211031 is 13011221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13011221121 = 3 ⋅4337073707.

It is a cyclic number.

It is not a de Polignac number, because 12112211031 - 2²¹ = 12110113879 is a prime.

It is a super-2 number, since 2×12112211031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12112211031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112211231) 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 3 ways as a sum of consecutive naturals, for example, 2018701836 + ... + 2018701841.

It is an arithmetic number, because the mean of its divisors is an integer number (4037403678).

Almost surely, 2^12112211031 is an apocalyptic number.

12112211031 is a deficient number, since it is larger than the sum of its proper divisors (4037403681).

12112211031 is an equidigital number, since it uses as much as digits as its factorization.

12112211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037403680.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12112211031 its reverse (13011221121), we get a palindrome (25123432152).

The spelling of 12112211031 in words is "twelve billion, one hundred twelve million, two hundred eleven thousand, thirty-one".