11221422012 has 72 divisors (see below), whose sum is σ = 29164716672. Its totient is φ = 3635280000.

The previous prime is 11221422007. The next prime is 11221422031. The reversal of 11221422012 is 21022412211.

11221422012 is a `hidden beast` number, since 11 + 221 + 422 + 0 + 12 = 666.

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

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, 1315762 + ... + 1324262.

Almost surely, 2^11221422012 is an apocalyptic number.

11221422012 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 11221422012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14582358336).

11221422012 is an abundant number, since it is smaller than the sum of its proper divisors (17943294660).

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

11221422012 is a wasteful number, since it uses less digits than its factorization.

11221422012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539 (or 9534 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11221422012 its reverse (21022412211), we get a palindrome (32243834223).

The spelling of 11221422012 in words is "eleven billion, two hundred twenty-one million, four hundred twenty-two thousand, twelve".