12112211102123 has 4 divisors (see below), whose sum is σ = 13213321202328. Its totient is φ = 11011101001920.

The previous prime is 12112211102111. The next prime is 12112211102137. The reversal of 12112211102123 is 32120111221121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12112211102123 - 2¹⁶ = 12112211036587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112211102095 and 12112211102104.

It is not an unprimeable number, because it can be changed into a prime (12112211102723) 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, 550555050086 + ... + 550555050107.

It is an arithmetic number, because the mean of its divisors is an integer number (3303330300582).

Almost surely, 2^{12112211102123} is an apocalyptic number.

12112211102123 is a deficient number, since it is larger than the sum of its proper divisors (1101110100205).

12112211102123 is a wasteful number, since it uses less digits than its factorization.

12112211102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101110100204.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 12112211102123 its reverse (32120111221121), we get a palindrome (44232322323244).

The spelling of 12112211102123 in words is "twelve trillion, one hundred twelve billion, two hundred eleven million, one hundred two thousand, one hundred twenty-three".