12012211211 has 32 divisors (see below), whose sum is σ = 16138311168. Its totient is φ = 8634781440.

The previous prime is 12012211199. The next prime is 12012211229. The reversal of 12012211211 is 11211221021.

It is a cyclic number.

It is not a de Polignac number, because 12012211211 - 2⁶ = 12012211147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12012211291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2346791 + ... + 2351903.

It is an arithmetic number, because the mean of its divisors is an integer number (504322224).

Almost surely, 2^12012211211 is an apocalyptic number.

12012211211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12012211211 is a deficient number, since it is larger than the sum of its proper divisors (4126099957).

12012211211 is a wasteful number, since it uses less digits than its factorization.

12012211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12012211211 its reverse (11211221021), we get a palindrome (23223432232).

The spelling of 12012211211 in words is "twelve billion, twelve million, two hundred eleven thousand, two hundred eleven".