11121211122222 has 32 divisors (see below), whose sum is σ = 22393757435904. Its totient is φ = 3681908403200.

The previous prime is 11121211122191. The next prime is 11121211122239. The reversal of 11121211122222 is 22222111212111.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6835128 + ... + 8304299.

It is an arithmetic number, because the mean of its divisors is an integer number (699804919872).

Almost surely, 2^{11121211122222} is an apocalyptic number.

11121211122222 is an abundant number, since it is smaller than the sum of its proper divisors (11272546313682).

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

11121211122222 is a wasteful number, since it uses less digits than its factorization.

11121211122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15140264.

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

Adding to 11121211122222 its reverse (22222111212111), we get a palindrome (33343322334333).

The spelling of 11121211122222 in words is "eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".