12111011212211 has 4 divisors (see below), whose sum is σ = 12406401729624. Its totient is φ = 11815620694800.

The previous prime is 12111011212169. The next prime is 12111011212249. The reversal of 12111011212211 is 11221211011121.

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

It is a cyclic number.

It is not a de Polignac number, because 12111011212211 - 2¹⁸ = 12111010950067 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 12111011212211.

It is not an unprimeable number, because it can be changed into a prime (12111011212511) 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, 147695258645 + ... + 147695258726.

It is an arithmetic number, because the mean of its divisors is an integer number (3101600432406).

Almost surely, 2^{12111011212211} is an apocalyptic number.

12111011212211 is a deficient number, since it is larger than the sum of its proper divisors (295390517413).

12111011212211 is an equidigital number, since it uses as much as digits as its factorization.

12111011212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295390517412.

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

Adding to 12111011212211 its reverse (11221211011121), we get a palindrome (23332222223332).

The spelling of 12111011212211 in words is "twelve trillion, one hundred eleven billion, eleven million, two hundred twelve thousand, two hundred eleven".