11222211220 has 24 divisors (see below), whose sum is σ = 25709066208. Its totient is φ = 4080804000.

The previous prime is 11222211199. The next prime is 11222211239. The reversal of 11222211220 is 2211222211.

It is a happy number.

11222211220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11222211194 and 11222211203.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25504806 + ... + 25505245.

It is an arithmetic number, because the mean of its divisors is an integer number (1071211092).

Almost surely, 2^11222211220 is an apocalyptic number.

11222211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222211220 is an abundant number, since it is smaller than the sum of its proper divisors (14486854988).

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

11222211220 is a wasteful number, since it uses less digits than its factorization.

11222211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51010071 (or 51010069 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11222211220 its reverse (2211222211), we get a palindrome (13433433431).

The spelling of 11222211220 in words is "eleven billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty".