11013121221020 has 48 divisors (see below), whose sum is σ = 24490699476768. Its totient is φ = 4145658992640.

The previous prime is 11013121221017. The next prime is 11013121221077. The reversal of 11013121221020 is 2012212131011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 11013121221020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309424 + ... + 4872456.

It is an arithmetic number, because the mean of its divisors is an integer number (510222905766).

Almost surely, 2^{11013121221020} is an apocalyptic number.

11013121221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11013121221020 is an abundant number, since it is smaller than the sum of its proper divisors (13477578255748).

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

11013121221020 is a wasteful number, since it uses less digits than its factorization.

11013121221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572150 (or 3572148 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11013121221020 its reverse (2012212131011), we get a palindrome (13025333352031).

Subtracting from 11013121221020 its reverse (2012212131011), we obtain a palindrome (9000909090009).

The spelling of 11013121221020 in words is "eleven trillion, thirteen billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".