12112121122 has 4 divisors (see below), whose sum is σ = 18168181686. Its totient is φ = 6056060560.

The previous prime is 12112121101. The next prime is 12112121129. The reversal of 12112121122 is 22112121121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22112121121 = 2423 ⋅9125927.

It can be written as a sum of positive squares in only one way, i.e., 10855347721 + 1256773401 = 104189^2 + 35451^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12112121096 and 12112121105.

It is not an unprimeable number, because it can be changed into a prime (12112121129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3028030279 + ... + 3028030282.

Almost surely, 2^12112121122 is an apocalyptic number.

12112121122 is a deficient number, since it is larger than the sum of its proper divisors (6056060564).

12112121122 is an equidigital number, since it uses as much as digits as its factorization.

12112121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056060563.

The product of its digits is 32, while the sum is 16.

Adding to 12112121122 its reverse (22112121121), we get a palindrome (34224242243).

Subtracting 12112121122 from its reverse (22112121121), we obtain a palindrome (9999999999).

The spelling of 12112121122 in words is "twelve billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-two".