111221211212 has 6 divisors (see below), whose sum is σ = 194637119628. Its totient is φ = 55610605604.

The previous prime is 111221211209. The next prime is 111221211253. The reversal of 111221211212 is 212112122111.

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 as a sum of consecutive naturals, namely, 13902651398 + ... + 13902651405.

It is an arithmetic number, because the mean of its divisors is an integer number (32439519938).

Almost surely, 2^111221211212 is an apocalyptic number.

It is an amenable number.

111221211212 is a deficient number, since it is larger than the sum of its proper divisors (83415908416).

111221211212 is a wasteful number, since it uses less digits than its factorization.

111221211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27805302807 (or 27805302805 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 111221211212 its reverse (212112122111), we get a palindrome (323333333323).

The spelling of 111221211212 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twelve".