11211020 has 12 divisors (see below), whose sum is σ = 23543184. Its totient is φ = 4484400.

The previous prime is 11210993. The next prime is 11211029. The reversal of 11211020 is 2011211.

It is a junction number, because it is equal to n+sod(n) for n = 11210989 and 11211007.

It is not an unprimeable number, because it can be changed into a prime (11211029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280256 + ... + 280295.

It is an arithmetic number, because the mean of its divisors is an integer number (1961932).

Almost surely, 2^11211020 is an apocalyptic number.

11211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211020 is an abundant number, since it is smaller than the sum of its proper divisors (12332164).

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

11211020 is a wasteful number, since it uses less digits than its factorization.

11211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560560 (or 560558 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11211020 is about 3348.2861287530. The cubic root of 11211020 is about 223.8111450298.

Adding to 11211020 its reverse (2011211), we get a palindrome (13222231).

The spelling of 11211020 in words is "eleven million, two hundred eleven thousand, twenty".