111122221011220 has 12 divisors (see below), whose sum is σ = 233356664123604. Its totient is φ = 44448888404480.

The previous prime is 111122221011203. The next prime is 111122221011227. The reversal of 111122221011220 is 22110122221111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73423750762756 + 37698470248464 = 8568766^2 + 6139908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122221011227) 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, 2778055525261 + ... + 2778055525300.

It is an arithmetic number, because the mean of its divisors is an integer number (19446388676967).

Almost surely, 2^{111122221011220} is an apocalyptic number.

111122221011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111122221011220 is an abundant number, since it is smaller than the sum of its proper divisors (122234443112384).

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

111122221011220 is a wasteful number, since it uses less digits than its factorization.

111122221011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556111050570 (or 5556111050568 counting only the distinct ones).

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

Adding to 111122221011220 its reverse (22110122221111), we get a palindrome (133232343232331).

The spelling of 111122221011220 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, eleven thousand, two hundred twenty".