11122220012220 has 288 divisors, whose sum is σ = 35574393988224. Its totient is φ = 2807177472000.

The previous prime is 11122220012219. The next prime is 11122220012237. The reversal of 11122220012220 is 2221002222111.

It is a happy number.

11122220012220 is a `hidden beast` number, since 1 + 11 + 222 + 200 + 12 + 220 = 666.

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 = 11122220012193 and 11122220012202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 778151394 + ... + 778165686.

It is an arithmetic number, because the mean of its divisors is an integer number (123522201348).

Almost surely, 2^{11122220012220} is an apocalyptic number.

11122220012220 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 11122220012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17787196994112).

11122220012220 is an abundant number, since it is smaller than the sum of its proper divisors (24452173976004).

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

11122220012220 is a wasteful number, since it uses less digits than its factorization.

11122220012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16293 (or 16288 counting only the distinct ones).

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

Adding to 11122220012220 its reverse (2221002222111), we get a palindrome (13343222234331).

The spelling of 11122220012220 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty million, twelve thousand, two hundred twenty".