11213221012 has 48 divisors (see below), whose sum is σ = 23888003328. Its totient is φ = 4495864320.

The previous prime is 11213221009. The next prime is 11213221031. The reversal of 11213221012 is 21012231211.

It is a congruent number.

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, 8962 + ... + 150022.

It is an arithmetic number, because the mean of its divisors is an integer number (497666736).

Almost surely, 2^11213221012 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 11213221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11944001664).

11213221012 is an abundant number, since it is smaller than the sum of its proper divisors (12674782316).

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

11213221012 is a wasteful number, since it uses less digits than its factorization.

11213221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141256 (or 141254 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11213221012 its reverse (21012231211), we get a palindrome (32225452223).

The spelling of 11213221012 in words is "eleven billion, two hundred thirteen million, two hundred twenty-one thousand, twelve".