11221222002012 has 144 divisors (see below), whose sum is σ = 31193222860800. Its totient is φ = 3372924602880.

The previous prime is 11221222001933. The next prime is 11221222002013. The reversal of 11221222002012 is 21020022212211.

It is a happy number.

11221222002012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (11221222002013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290618164 + ... + 290656772.

It is an arithmetic number, because the mean of its divisors is an integer number (216619603200).

Almost surely, 2^{11221222002012} is an apocalyptic number.

11221222002012 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 11221222002012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15596611430400).

11221222002012 is an abundant number, since it is smaller than the sum of its proper divisors (19972000858788).

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

11221222002012 is a wasteful number, since it uses less digits than its factorization.

11221222002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44536 (or 44531 counting only the distinct ones).

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

Adding to 11221222002012 its reverse (21020022212211), we get a palindrome (32241244214223).

The spelling of 11221222002012 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two thousand, twelve".