11211012020 has 24 divisors (see below), whose sum is σ = 25354135464. Its totient is φ = 4139450496.

The previous prime is 11211012013. The next prime is 11211012053. The reversal of 11211012020 is 2021011211.

It can be written as a sum of positive squares in 4 ways, for example, as 495863824 + 10715148196 = 22268^2 + 103514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11211011992 and 11211012010.

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 7 ways as a sum of consecutive naturals, for example, 21559379 + ... + 21559898.

It is an arithmetic number, because the mean of its divisors is an integer number (1056422311).

Almost surely, 2^11211012020 is an apocalyptic number.

11211012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211012020 is an abundant number, since it is smaller than the sum of its proper divisors (14143123444).

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

11211012020 is a wasteful number, since it uses less digits than its factorization.

11211012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43119299 (or 43119297 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11211012020 its reverse (2021011211), we get a palindrome (13232023231).

The spelling of 11211012020 in words is "eleven billion, two hundred eleven million, twelve thousand, twenty".