11101222220020 has 12 divisors (see below), whose sum is σ = 23312566662084. Its totient is φ = 4440488888000.

The previous prime is 11101222219979. The next prime is 11101222220021. The reversal of 11101222220020 is 2002222210111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3904117581456 + 7197104638564 = 1975884^2 + 2682742^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11101222219976 and 11101222220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101222220021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277530555481 + ... + 277530555520.

It is an arithmetic number, because the mean of its divisors is an integer number (1942713888507).

Almost surely, 2^{11101222220020} is an apocalyptic number.

11101222220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101222220020 is an abundant number, since it is smaller than the sum of its proper divisors (12211344442064).

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

11101222220020 is a wasteful number, since it uses less digits than its factorization.

11101222220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555061111010 (or 555061111008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11101222220020 its reverse (2002222210111), we get a palindrome (13103444430131).

Subtracting from 11101222220020 its reverse (2002222210111), we obtain a palindrome (9099000009909).

The spelling of 11101222220020 in words is "eleven trillion, one hundred one billion, two hundred twenty-two million, two hundred twenty thousand, twenty".