11221121223208 has 64 divisors (see below), whose sum is σ = 22731792773760. Its totient is φ = 5162147095296.

The previous prime is 11221121223181. The next prime is 11221121223209. The reversal of 11221121223208 is 80232212112211.

It is a super-2 number, since 2×11221121223208² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11221121223209) 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, 39356010 + ... + 39640102.

It is an arithmetic number, because the mean of its divisors is an integer number (355184262090).

Almost surely, 2^{11221121223208} is an apocalyptic number.

It is an amenable number.

11221121223208 is an abundant number, since it is smaller than the sum of its proper divisors (11510671550552).

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

11221121223208 is a wasteful number, since it uses less digits than its factorization.

11221121223208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285346 (or 285342 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

Adding to 11221121223208 its reverse (80232212112211), we get a palindrome (91453333335419).

The spelling of 11221121223208 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred eight".