111210212209 has 4 divisors (see below), whose sum is σ = 113095131120. Its totient is φ = 109325293300.

The previous prime is 111210212203. The next prime is 111210212227. The reversal of 111210212209 is 902212012111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111210212209 is a prime.

It is a super-2 number, since 2×111210212209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111210212209.

It is not an unprimeable number, because it can be changed into a prime (111210212203) 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 in 3 ways as a sum of consecutive naturals, for example, 942459367 + ... + 942459484.

It is an arithmetic number, because the mean of its divisors is an integer number (28273782780).

Almost surely, 2^111210212209 is an apocalyptic number.

It is an amenable number.

111210212209 is a deficient number, since it is larger than the sum of its proper divisors (1884918911).

111210212209 is an equidigital number, since it uses as much as digits as its factorization.

111210212209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884918910.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 111210212209 in words is "one hundred eleven billion, two hundred ten million, two hundred twelve thousand, two hundred nine".