111221123212 has 12 divisors (see below), whose sum is σ = 195150522280. Its totient is φ = 55463831136.

The previous prime is 111221123191. The next prime is 111221123249. The reversal of 111221123212 is 212321122111.

It is a self number, because there is not a number n which added to its sum of digits gives 111221123212.

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, 36680913 + ... + 36683944.

Almost surely, 2^111221123212 is an apocalyptic number.

It is an amenable number.

111221123212 is a deficient number, since it is larger than the sum of its proper divisors (83929399068).

111221123212 is a wasteful number, since it uses less digits than its factorization.

111221123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73365240 (or 73365238 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 111221123212 its reverse (212321122111), we get a palindrome (323542245323).

The spelling of 111221123212 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred twelve".