11122221212 has 12 divisors (see below), whose sum is σ = 19612467336. Its totient is φ = 5518659120.

The previous prime is 11122221211. The next prime is 11122221247. The reversal of 11122221212 is 21212222111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122221211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10612283 + ... + 10613330.

It is an arithmetic number, because the mean of its divisors is an integer number (1634372278).

Almost surely, 2^11122221212 is an apocalyptic number.

It is an amenable number.

11122221212 is a deficient number, since it is larger than the sum of its proper divisors (8490246124).

11122221212 is a wasteful number, since it uses less digits than its factorization.

11122221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21225748 (or 21225746 counting only the distinct ones).

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

Adding to 11122221212 its reverse (21212222111), we get a palindrome (32334443323).

The spelling of 11122221212 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".