111210221212 has 6 divisors (see below), whose sum is σ = 194617887128. Its totient is φ = 55605110604.

The previous prime is 111210221167. The next prime is 111210221219. The reversal of 111210221212 is 212122012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210221219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13901277648 + ... + 13901277655.

Almost surely, 2^111210221212 is an apocalyptic number.

It is an amenable number.

111210221212 is a deficient number, since it is larger than the sum of its proper divisors (83407665916).

111210221212 is a wasteful number, since it uses less digits than its factorization.

111210221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27802555307 (or 27802555305 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111210221212 its reverse (212122012111), we get a palindrome (323332233323).

The spelling of 111210221212 in words is "one hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, two hundred twelve".