11101101100020 has 288 divisors, whose sum is σ = 37133519544576. Its totient is φ = 2672674099200.

The previous prime is 11101101099947. The next prime is 11101101100043. The reversal of 11101101100020 is 2000110110111.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11101101099975 and 11101101100011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7348135 + ... + 8729105.

It is an arithmetic number, because the mean of its divisors is an integer number (128935831752).

Almost surely, 2^{11101101100020} is an apocalyptic number.

11101101100020 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 11101101100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18566759772288).

11101101100020 is an abundant number, since it is smaller than the sum of its proper divisors (26032418444556).

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

11101101100020 is a wasteful number, since it uses less digits than its factorization.

11101101100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381111 (or 1381106 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11101101100020 its reverse (2000110110111), we get a palindrome (13101211210131).

The spelling of 11101101100020 in words is "eleven trillion, one hundred one billion, one hundred one million, one hundred thousand, twenty".