11222212112 has 20 divisors (see below), whose sum is σ = 21785768940. Its totient is φ = 5600078208.

The previous prime is 11222212061. The next prime is 11222212123. The reversal of 11222212112 is 21121222211.

It can be written as a sum of positive squares in 2 ways, for example, as 6986285056 + 4235927056 = 83584^2 + 65084^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680843 + ... + 697130.

It is an arithmetic number, because the mean of its divisors is an integer number (1089288447).

Almost surely, 2^11222212112 is an apocalyptic number.

It is an amenable number.

11222212112 is a deficient number, since it is larger than the sum of its proper divisors (10563556828).

11222212112 is a wasteful number, since it uses less digits than its factorization.

11222212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378490 (or 1378484 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 11222212112 its reverse (21121222211), we get a palindrome (32343434323).

The spelling of 11222212112 in words is "eleven billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twelve".