11223213012 has 192 divisors, whose sum is σ = 32462438400. Its totient is φ = 3324706560.

The previous prime is 11223213011. The next prime is 11223213077. The reversal of 11223213012 is 21031232211.

It is a super-2 number, since 2×11223213012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223213011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11013439 + ... + 11014457.

It is an arithmetic number, because the mean of its divisors is an integer number (169075200).

Almost surely, 2^11223213012 is an apocalyptic number.

11223213012 is a gapful number since it is divisible by the number (12) 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 11223213012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16231219200).

11223213012 is an abundant number, since it is smaller than the sum of its proper divisors (21239225388).

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

11223213012 is a wasteful number, since it uses less digits than its factorization.

11223213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11223213012 its reverse (21031232211), we get a palindrome (32254445223).

It can be divided in two parts, 112 and 23213012, that added together give a square (23213124 = 4818²).

The spelling of 11223213012 in words is "eleven billion, two hundred twenty-three million, two hundred thirteen thousand, twelve".