11112221122122 has 64 divisors (see below), whose sum is σ = 22687440926976. Its totient is φ = 3627180910080.

The previous prime is 11112221122031. The next prime is 11112221122129. The reversal of 11112221122122 is 22122112221111.

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

It is not an unprimeable number, because it can be changed into a prime (11112221122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 720956488 + ... + 720971900.

It is an arithmetic number, because the mean of its divisors is an integer number (354491264484).

Almost surely, 2^{11112221122122} is an apocalyptic number.

11112221122122 is an abundant number, since it is smaller than the sum of its proper divisors (11575219804854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11112221122122 is a wasteful number, since it uses less digits than its factorization.

11112221122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19695.

The product of its digits is 128, while the sum is 21.

Adding to 11112221122122 its reverse (22122112221111), we get a palindrome (33234333343233).

The spelling of 11112221122122 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-two".