11101011220020 has 384 divisors, whose sum is σ = 33539053363200. Its totient is φ = 2736543744000.

The previous prime is 11101011220003. The next prime is 11101011220021. The reversal of 11101011220020 is 2002211010111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11101011219978 and 11101011220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101011220021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2713518175 + ... + 2713522265.

It is an arithmetic number, because the mean of its divisors is an integer number (87341284800).

Almost surely, 2^{11101011220020} is an apocalyptic number.

11101011220020 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 11101011220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16769526681600).

11101011220020 is an abundant number, since it is smaller than the sum of its proper divisors (22438042143180).

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

11101011220020 is a wasteful number, since it uses less digits than its factorization.

11101011220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11101011220020 its reverse (2002211010111), we get a palindrome (13103222230131).

The spelling of 11101011220020 in words is "eleven trillion, one hundred one billion, eleven million, two hundred twenty thousand, twenty".