11223312212 has 72 divisors (see below), whose sum is σ = 24252177600. Its totient is φ = 4515684096.

The previous prime is 11223312193. The next prime is 11223312259. The reversal of 11223312212 is 21221332211.

It is a super-4 number, since 4×11223312212⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1392089 + ... + 1400127.

It is an arithmetic number, because the mean of its divisors is an integer number (336835800).

Almost surely, 2^11223312212 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 11223312212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12126088800).

11223312212 is an abundant number, since it is smaller than the sum of its proper divisors (13028865388).

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

11223312212 is a wasteful number, since it uses less digits than its factorization.

11223312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8493 (or 8484 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 11223312212 its reverse (21221332211), we get a palindrome (32444644423).

The spelling of 11223312212 in words is "eleven billion, two hundred twenty-three million, three hundred twelve thousand, two hundred twelve".