12011211211 has 8 divisors (see below), whose sum is σ = 12313811664. Its totient is φ = 11709070080.

The previous prime is 12011211187. The next prime is 12011211221. The reversal of 12011211211 is 11211211021.

It is a happy number.

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 12011211211 - 2¹⁷ = 12011080139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011211191 and 12011211200.

It is not an unprimeable number, because it can be changed into a prime (12011211221) 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 7 ways as a sum of consecutive naturals, for example, 61566 + ... + 166771.

It is an arithmetic number, because the mean of its divisors is an integer number (1539226458).

Almost surely, 2^12011211211 is an apocalyptic number.

12011211211 is a deficient number, since it is larger than the sum of its proper divisors (302600453).

12011211211 is a wasteful number, since it uses less digits than its factorization.

12011211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229661.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12011211211 its reverse (11211211021), we get a palindrome (23222422232).

The spelling of 12011211211 in words is "twelve billion, eleven million, two hundred eleven thousand, two hundred eleven".