12111221121122 has 4 divisors (see below), whose sum is σ = 18166831681686. Its totient is φ = 6055610560560.

The previous prime is 12111221121113. The next prime is 12111221121173. The reversal of 12111221121122 is 22112112211121.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8770547403121 + 3340673718001 = 2961511^2 + 1827751^2 .

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 = 12111221121094 and 12111221121103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3027805280279 + ... + 3027805280282.

Almost surely, 2^{12111221121122} is an apocalyptic number.

12111221121122 is a deficient number, since it is larger than the sum of its proper divisors (6055610560564).

12111221121122 is an equidigital number, since it uses as much as digits as its factorization.

12111221121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055610560563.

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

Adding to 12111221121122 its reverse (22112112211121), we get a palindrome (34223333332243).

The spelling of 12111221121122 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".