11321020 has 48 divisors (see below), whose sum is σ = 24948000. Its totient is φ = 4309760.

The previous prime is 11321003. The next prime is 11321029. The reversal of 11321020 is 2012311.

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 = 11320988 and 11321006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75906 + ... + 76054.

It is an arithmetic number, because the mean of its divisors is an integer number (519750).

Almost surely, 2^11321020 is an apocalyptic number.

11321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11321020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12474000).

11321020 is an abundant number, since it is smaller than the sum of its proper divisors (13626980).

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

11321020 is a wasteful number, since it uses less digits than its factorization.

11321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 11321020 is about 3364.6723466038. The cubic root of 11321020 is about 224.5407587665.

Adding to 11321020 its reverse (2012311), we get a palindrome (13333331).

The spelling of 11321020 in words is "eleven million, three hundred twenty-one thousand, twenty".