111102212211220 has 48 divisors (see below), whose sum is σ = 234667403001360. Its totient is φ = 44183225834496.

The previous prime is 111102212211203. The next prime is 111102212211251. The reversal of 111102212211220 is 22112212201111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11481132577924 + 99621079633296 = 3388382^2 + 9981036^2 .

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, 222342616 + ... + 222841744.

It is an arithmetic number, because the mean of its divisors is an integer number (4888904229195).

Almost surely, 2^{111102212211220} is an apocalyptic number.

111102212211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111102212211220 is an abundant number, since it is smaller than the sum of its proper divisors (123565190790140).

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

111102212211220 is a wasteful number, since it uses less digits than its factorization.

111102212211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563644 (or 563642 counting only the distinct ones).

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

Adding to 111102212211220 its reverse (22112212201111), we get a palindrome (133214424412331).

The spelling of 111102212211220 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty".