1111122100220 has 192 divisors, whose sum is σ = 2686562121600. Its totient is φ = 382292951040.

The previous prime is 1111122100201. The next prime is 1111122100223. The reversal of 1111122100220 is 220012211111.

It is a junction number, because it is equal to n+sod(n) for n = 1111122100195 and 1111122100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122100223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64155002 + ... + 64172318.

It is an arithmetic number, because the mean of its divisors is an integer number (13992511050).

Almost surely, 2^{1111122100220} is an apocalyptic number.

1111122100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111122100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343281060800).

1111122100220 is an abundant number, since it is smaller than the sum of its proper divisors (1575440021380).

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

1111122100220 is a wasteful number, since it uses less digits than its factorization.

1111122100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17568 (or 17566 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1111122100220 its reverse (220012211111), we get a palindrome (1331134311331).

The spelling of 1111122100220 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thousand, two hundred twenty".