11011100020020 has 120 divisors (see below), whose sum is σ = 34544886319944. Its totient is φ = 2936067416064.

The previous prime is 11011100020001. The next prime is 11011100020099. The reversal of 11011100020020 is 2002000111011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2254730256 + 11008845289764 = 47484^2 + 3317958^2 .

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 = 11011100019984 and 11011100020011.

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 39 ways as a sum of consecutive naturals, for example, 21351124 + ... + 21860756.

Almost surely, 2^{11011100020020} is an apocalyptic number.

11011100020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011100020020 is an abundant number, since it is smaller than the sum of its proper divisors (23533786299924).

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

11011100020020 is a wasteful number, since it uses less digits than its factorization.

11011100020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522991 (or 522980 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11011100020020 its reverse (2002000111011), we get a palindrome (13013100131031).

Subtracting from 11011100020020 its reverse (2002000111011), we obtain a palindrome (9009099909009).

The spelling of 11011100020020 in words is "eleven trillion, eleven billion, one hundred million, twenty thousand, twenty".