11111220220122 has 144 divisors (see below), whose sum is σ = 26791880117184. Its totient is φ = 3325076515200.

The previous prime is 11111220220097. The next prime is 11111220220171. The reversal of 11111220220122 is 22102202211111.

It is a super-2 number, since 2×11111220220122² (a number of 27 digits) contains 22 as substring.

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 = 11111220220095 and 11111220220104.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 481389622 + ... + 481412702.

It is an arithmetic number, because the mean of its divisors is an integer number (186054723036).

Almost surely, 2^{11111220220122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111220220122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13395940058592).

11111220220122 is an abundant number, since it is smaller than the sum of its proper divisors (15680659897062).

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

11111220220122 is a wasteful number, since it uses less digits than its factorization.

11111220220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25857 (or 25843 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11111220220122 its reverse (22102202211111), we get a palindrome (33213422431233).

The spelling of 11111220220122 in words is "eleven trillion, one hundred eleven billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-two".