11213021320 has 64 divisors (see below), whose sum is σ = 25727984640. Its totient is φ = 4396704000.

The previous prime is 11213021311. The next prime is 11213021353. The reversal of 11213021320 is 2312031211.

It is a super-3 number, since 3×11213021320³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11213021294 and 11213021303.

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, 4134765 + ... + 4137475.

It is an arithmetic number, because the mean of its divisors is an integer number (401999760).

Almost surely, 2^11213021320 is an apocalyptic number.

11213021320 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 11213021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12863992320).

11213021320 is an abundant number, since it is smaller than the sum of its proper divisors (14514963320).

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

11213021320 is a wasteful number, since it uses less digits than its factorization.

11213021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726 (or 4722 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11213021320 its reverse (2312031211), we get a palindrome (13525052531).

The spelling of 11213021320 in words is "eleven billion, two hundred thirteen million, twenty-one thousand, three hundred twenty".