12111212121122 has 8 divisors (see below), whose sum is σ = 18464634873372. Its totient is φ = 5956333830000.

The previous prime is 12111212121121. The next prime is 12111212121221. The reversal of 12111212121122 is 22112121211121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12103225302961 + 7986818161 = 3478969^2 + 89369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 = 12111212121094 and 12111212121103.

It is not an unprimeable number, because it can be changed into a prime (12111212121121) 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, 49636115129 + ... + 49636115372.

Almost surely, 2^{12111212121122} is an apocalyptic number.

12111212121122 is a deficient number, since it is larger than the sum of its proper divisors (6353422752250).

12111212121122 is an equidigital number, since it uses as much as digits as its factorization.

12111212121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99272230564.

The product of its digits is 64, while the sum is 20.

Adding to 12111212121122 its reverse (22112121211121), we get a palindrome (34223333332243).

The spelling of 12111212121122 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twenty-two".