11011211221222 has 4 divisors (see below), whose sum is σ = 16516816831836. Its totient is φ = 5505605610610.

The previous prime is 11011211221183. The next prime is 11011211221229. The reversal of 11011211221222 is 22212211211011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11011211221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011211221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752802805304 + ... + 2752802805307.

It is an arithmetic number, because the mean of its divisors is an integer number (4129204207959).

Almost surely, 2^{11011211221222} is an apocalyptic number.

11011211221222 is a deficient number, since it is larger than the sum of its proper divisors (5505605610614).

11011211221222 is an equidigital number, since it uses as much as digits as its factorization.

11011211221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505605610613.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11011211221222 its reverse (22212211211011), we get a palindrome (33223422432233).

The spelling of 11011211221222 in words is "eleven trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".