12020321211 has 4 divisors (see below), whose sum is σ = 16027094952. Its totient is φ = 8013547472.

The previous prime is 12020321197. The next prime is 12020321213. The reversal of 12020321211 is 11212302021.

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 12020321211 - 2⁶ = 12020321147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12020321213) 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, 2003386866 + ... + 2003386871.

It is an arithmetic number, because the mean of its divisors is an integer number (4006773738).

Almost surely, 2^12020321211 is an apocalyptic number.

12020321211 is a deficient number, since it is larger than the sum of its proper divisors (4006773741).

12020321211 is an equidigital number, since it uses as much as digits as its factorization.

12020321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006773740.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12020321211 its reverse (11212302021), we get a palindrome (23232623232).

The spelling of 12020321211 in words is "twelve billion, twenty million, three hundred twenty-one thousand, two hundred eleven".