111212112010211 has 4 divisors (see below), whose sum is σ = 117065381063400. Its totient is φ = 105358842957024.

The previous prime is 111212112010201. The next prime is 111212112010247. The reversal of 111212112010211 is 112010211212111.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-111212112010211 is a prime.

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 111212112010211.

It is not an unprimeable number, because it can be changed into a prime (111212112010201) 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, 2926634526566 + ... + 2926634526603.

It is an arithmetic number, because the mean of its divisors is an integer number (29266345265850).

Almost surely, 2^{111212112010211} is an apocalyptic number.

111212112010211 is a deficient number, since it is larger than the sum of its proper divisors (5853269053189).

111212112010211 is an equidigital number, since it uses as much as digits as its factorization.

111212112010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853269053188.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111212112010211 its reverse (112010211212111), we get a palindrome (223222323222322).

The spelling of 111212112010211 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twelve million, ten thousand, two hundred eleven".