11222113212 has 72 divisors (see below), whose sum is σ = 29349465600. Its totient is φ = 3611705760.

The previous prime is 11222113193. The next prime is 11222113213. The reversal of 11222113212 is 21231122211.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222113213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 483039 + ... + 505737.

Almost surely, 2^11222113212 is an apocalyptic number.

11222113212 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 11222113212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14674732800).

11222113212 is an abundant number, since it is smaller than the sum of its proper divisors (18127352388).

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

11222113212 is a wasteful number, since it uses less digits than its factorization.

11222113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23183 (or 23178 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11222113212 its reverse (21231122211), we get a palindrome (32453235423).

The spelling of 11222113212 in words is "eleven billion, two hundred twenty-two million, one hundred thirteen thousand, two hundred twelve".