11221212222112 has 12 divisors (see below), whose sum is σ = 22091761562346. Its totient is φ = 5610606111040.

The previous prime is 11221212222109. The next prime is 11221212222113. The reversal of 11221212222112 is 21122221212211.

It can be written as a sum of positive squares in only one way, i.e., 11039909988496 + 181302233616 = 3322636^2 + 425796^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11221212222113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175331440939 + ... + 175331441002.

Almost surely, 2^{11221212222112} is an apocalyptic number.

It is an amenable number.

11221212222112 is a deficient number, since it is larger than the sum of its proper divisors (10870549340234).

11221212222112 is an equidigital number, since it uses as much as digits as its factorization.

11221212222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350662881951 (or 350662881943 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 11221212222112 its reverse (21122221212211), we get a palindrome (32343433434323).

The spelling of 11221212222112 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twelve".