12111211212211 has 8 divisors (see below), whose sum is σ = 12287206323504. Its totient is φ = 11935488752640.

The previous prime is 12111211212193. The next prime is 12111211212313. The reversal of 12111211212211 is 11221211211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12111211212211 - 2¹³ = 12111211204019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111211212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68073445 + ... + 68251126.

It is an arithmetic number, because the mean of its divisors is an integer number (1535900790438).

Almost surely, 2^{12111211212211} is an apocalyptic number.

12111211212211 is a deficient number, since it is larger than the sum of its proper divisors (175995111293).

12111211212211 is a wasteful number, since it uses less digits than its factorization.

12111211212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136325861.

The product of its digits is 32, while the sum is 19.

Adding to 12111211212211 its reverse (11221211211121), we get a palindrome (23332422423332).

The spelling of 12111211212211 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".