111222220001022 has 96 divisors (see below), whose sum is σ = 261235567101600. Its totient is φ = 33995903834880.

The previous prime is 111222220001021. The next prime is 111222220001023. The reversal of 111222220001022 is 220100022222111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111222220001021) and next prime (111222220001023).

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 = 111222220000986 and 111222220001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222220001021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150219772 + ... + 150958352.

It is an arithmetic number, because the mean of its divisors is an integer number (2721203823975).

Almost surely, 2^{111222220001022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111222220001022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130617783550800).

111222220001022 is an abundant number, since it is smaller than the sum of its proper divisors (150013347100578).

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

111222220001022 is a wasteful number, since it uses less digits than its factorization.

111222220001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742858 (or 742855 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111222220001022 its reverse (220100022222111), we get a palindrome (331322242223133).

The spelling of 111222220001022 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred twenty million, one thousand, twenty-two".