12120321211 has 2 divisors, whose sum is σ = 12120321212. Its totient is φ = 12120321210.

The previous prime is 12120321209. The next prime is 12120321221. The reversal of 12120321211 is 11212302121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12120321211 - 2¹ = 12120321209 is a prime.

Together with 12120321209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12120321221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060160605 + 6060160606.

It is an arithmetic number, because the mean of its divisors is an integer number (6060160606).

Almost surely, 2^12120321211 is an apocalyptic number.

12120321211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120321211 is an equidigital number, since it uses as much as digits as its factorization.

12120321211 is an evil number, because the sum of its binary digits is even.

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

Adding to 12120321211 its reverse (11212302121), we get a palindrome (23332623332).

The spelling of 12120321211 in words is "twelve billion, one hundred twenty million, three hundred twenty-one thousand, two hundred eleven".