11211002020 has 48 divisors (see below), whose sum is σ = 24225043248. Its totient is φ = 4356185600.

The previous prime is 11211002017. The next prime is 11211002081. The reversal of 11211002020 is 2020011211.

It can be written as a sum of positive squares in 8 ways, for example, as 83283876 + 11127718144 = 9126^2 + 105488^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11211001988 and 11211002006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54702 + ... + 159418.

It is an arithmetic number, because the mean of its divisors is an integer number (504688401).

Almost surely, 2^11211002020 is an apocalyptic number.

11211002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211002020 is an abundant number, since it is smaller than the sum of its proper divisors (13014041228).

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

11211002020 is a wasteful number, since it uses less digits than its factorization.

11211002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104880 (or 104878 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11211002020 its reverse (2020011211), we get a palindrome (13231013231).

The spelling of 11211002020 in words is "eleven billion, two hundred eleven million, two thousand, twenty".