11220021012020 has 24 divisors (see below), whose sum is σ = 23580210751944. Its totient is φ = 4484548094976.

The previous prime is 11220021011981. The next prime is 11220021012041. The reversal of 11220021012020 is 2021012002211.

It can be written as a sum of positive squares in 4 ways, for example, as 1440278413456 + 9779742598564 = 1200116^2 + 3127258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11220021011986 and 11220021012004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216242777 + ... + 216294656.

It is an arithmetic number, because the mean of its divisors is an integer number (982508781331).

Almost surely, 2^{11220021012020} is an apocalyptic number.

11220021012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220021012020 is an abundant number, since it is smaller than the sum of its proper divisors (12360189739924).

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

11220021012020 is a wasteful number, since it uses less digits than its factorization.

11220021012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432538739 (or 432538737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11220021012020 its reverse (2021012002211), we get a palindrome (13241033014231).

The spelling of 11220021012020 in words is "eleven trillion, two hundred twenty billion, twenty-one million, twelve thousand, twenty".