111101212211022 has 72 divisors (see below), whose sum is σ = 263706246137880. Its totient is φ = 33526164339360.

The previous prime is 111101212211021. The next prime is 111101212211047. The reversal of 111101212211022 is 220112212101111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111101212210986 and 111101212211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101212211021) 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 35 ways as a sum of consecutive naturals, for example, 6398304 + ... + 16221612.

It is an arithmetic number, because the mean of its divisors is an integer number (3662586751915).

Almost surely, 2^{111101212211022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111101212211022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131853123068940).

111101212211022 is an abundant number, since it is smaller than the sum of its proper divisors (152605033926858).

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

111101212211022 is a wasteful number, since it uses less digits than its factorization.

111101212211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9823806 (or 9823564 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111101212211022 its reverse (220112212101111), we get a palindrome (331213424312133).

The spelling of 111101212211022 in words is "one hundred eleven trillion, one hundred one billion, two hundred twelve million, two hundred eleven thousand, twenty-two".