11011021221222 has 96 divisors (see below), whose sum is σ = 26936307226080. Its totient is φ = 3331623873600.

The previous prime is 11011021221209. The next prime is 11011021221223. The reversal of 11011021221222 is 22212212011011.

11011021221222 is a `hidden beast` number, since 110 + 110 + 2 + 1 + 221 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 11011021221195 and 11011021221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011021221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3044248 + ... + 5593700.

It is an arithmetic number, because the mean of its divisors is an integer number (280586533605).

Almost surely, 2^{11011021221222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11011021221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13468153613040).

11011021221222 is an abundant number, since it is smaller than the sum of its proper divisors (15925286004858).

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

11011021221222 is a wasteful number, since it uses less digits than its factorization.

11011021221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550147 (or 2550130 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11011021221222 its reverse (22212212011011), we get a palindrome (33223233232233).

The spelling of 11011021221222 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".