12112121023 has 4 divisors (see below), whose sum is σ = 12113354248. Its totient is φ = 12110887800.

The previous prime is 12112121017. The next prime is 12112121029. The reversal of 12112121023 is 32012121121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32012121121 = 9901 ⋅3233221.

It is an interprime number because it is at equal distance from previous prime (12112121017) and next prime (12112121029).

It is a cyclic number.

It is not a de Polignac number, because 12112121023 - 2⁵ = 12112120991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112120988 and 12112121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112121029) 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, 601761 + ... + 621562.

It is an arithmetic number, because the mean of its divisors is an integer number (3028338562).

Almost surely, 2^12112121023 is an apocalyptic number.

12112121023 is a deficient number, since it is larger than the sum of its proper divisors (1233225).

12112121023 is an equidigital number, since it uses as much as digits as its factorization.

12112121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233224.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12112121023 its reverse (32012121121), we get a palindrome (44124242144).

The spelling of 12112121023 in words is "twelve billion, one hundred twelve million, one hundred twenty-one thousand, twenty-three".