11111001222 has 32 divisors (see below), whose sum is σ = 23548608000. Its totient is φ = 3485183328.

The previous prime is 11111001191. The next prime is 11111001227. The reversal of 11111001222 is 22210011111.

It is a junction number, because it is equal to n+sod(n) for n = 11111001198 and 11111001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310078 + ... + 344049.

It is an arithmetic number, because the mean of its divisors is an integer number (735894000).

Almost surely, 2^11111001222 is an apocalyptic number.

11111001222 is an abundant number, since it is smaller than the sum of its proper divisors (12437606778).

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

11111001222 is a wasteful number, since it uses less digits than its factorization.

11111001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654300.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11111001222 its reverse (22210011111), we get a palindrome (33321012333).

The spelling of 11111001222 in words is "eleven billion, one hundred eleven million, one thousand, two hundred twenty-two".