11111222210122 has 4 divisors (see below), whose sum is σ = 16666833315186. Its totient is φ = 5555611105060.

The previous prime is 11111222210029. The next prime is 11111222210129. The reversal of 11111222210122 is 22101222211111.

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., 10798854117921 + 312368092201 = 3286161^2 + 558899^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11111222210122.

It is not an unprimeable number, because it can be changed into a prime (11111222210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777805552529 + ... + 2777805552532.

Almost surely, 2^{11111222210122} is an apocalyptic number.

11111222210122 is a deficient number, since it is larger than the sum of its proper divisors (5555611105064).

11111222210122 is an equidigital number, since it uses as much as digits as its factorization.

11111222210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555611105063.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11111222210122 its reverse (22101222211111), we get a palindrome (33212444421233).

The spelling of 11111222210122 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-two".