12012231211 has 8 divisors (see below), whose sum is σ = 12227717840. Its totient is φ = 11797809408.

The previous prime is 12012231193. The next prime is 12012231227. The reversal of 12012231211 is 11213221021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012231211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012231311) 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, 243426 + ... + 288583.

It is an arithmetic number, because the mean of its divisors is an integer number (1528464730).

Almost surely, 2^12012231211 is an apocalyptic number.

12012231211 is a deficient number, since it is larger than the sum of its proper divisors (215486629).

12012231211 is an equidigital number, since it uses as much as digits as its factorization.

12012231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532413.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12012231211 its reverse (11213221021), we get a palindrome (23225452232).

The spelling of 12012231211 in words is "twelve billion, twelve million, two hundred thirty-one thousand, two hundred eleven".