11122111222220 has 96 divisors (see below), whose sum is σ = 25058506346496. Its totient is φ = 4136304268800.

The previous prime is 11122111222193. The next prime is 11122111222231. The reversal of 11122111222220 is 2222211122111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11122111222192 and 11122111222201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4023017 + ... + 6199103.

It is an arithmetic number, because the mean of its divisors is an integer number (261026107776).

Almost surely, 2^{11122111222220} is an apocalyptic number.

11122111222220 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 11122111222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12529253173248).

11122111222220 is an abundant number, since it is smaller than the sum of its proper divisors (13936395124276).

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

11122111222220 is a wasteful number, since it uses less digits than its factorization.

11122111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176431 (or 2176429 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11122111222220 its reverse (2222211122111), we get a palindrome (13344322344331).

The spelling of 11122111222220 in words is "eleven trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".