11222220144 has 60 divisors (see below), whose sum is σ = 29119655816. Its totient is φ = 3724178304.

The previous prime is 11222220143. The next prime is 11222220197. The reversal of 11222220144 is 44102222211.

It is a self number, because there is not a number n which added to its sum of digits gives 11222220144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222220143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2739762 + ... + 2743854.

Almost surely, 2^11222220144 is an apocalyptic number.

It is an amenable number.

11222220144 is an abundant number, since it is smaller than the sum of its proper divisors (17897435672).

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

11222220144 is an equidigital number, since it uses as much as digits as its factorization.

11222220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582 (or 4337 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 11222220144 its reverse (44102222211), we get a palindrome (55324442355).

The spelling of 11222220144 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, one hundred forty-four".