11203213312 has 48 divisors (see below), whose sum is σ = 22428085680. Its totient is φ = 5594824704.

The previous prime is 11203213309. The next prime is 11203213321. The reversal of 11203213312 is 21331230211.

It is a self number, because there is not a number n which added to its sum of digits gives 11203213312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977588 + ... + 1983244.

It is an arithmetic number, because the mean of its divisors is an integer number (467251785).

Almost surely, 2^11203213312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11203213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11214042840).

11203213312 is an abundant number, since it is smaller than the sum of its proper divisors (11224872368).

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

11203213312 is an frugal number, since it uses more digits than its factorization.

11203213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646 (or 6626 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11203213312 its reverse (21331230211), we get a palindrome (32534443523).

The spelling of 11203213312 in words is "eleven billion, two hundred three million, two hundred thirteen thousand, three hundred twelve".