12120010011211 has 4 divisors (see below), whose sum is σ = 12120020824312. Its totient is φ = 12119999198112.

The previous prime is 12120010011209. The next prime is 12120010011223. The reversal of 12120010011211 is 11211001002121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12120010011211 - 2¹ = 12120010011209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120010011191 and 12120010011200.

It is not an unprimeable number, because it can be changed into a prime (12120010011251) 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, 3501501 + ... + 6041566.

It is an arithmetic number, because the mean of its divisors is an integer number (3030005206078).

Almost surely, 2^{12120010011211} is an apocalyptic number.

12120010011211 is a deficient number, since it is larger than the sum of its proper divisors (10813101).

12120010011211 is an equidigital number, since it uses as much as digits as its factorization.

12120010011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10813100.

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

Adding to 12120010011211 its reverse (11211001002121), we get a palindrome (23331011013332).

The spelling of 12120010011211 in words is "twelve trillion, one hundred twenty billion, ten million, eleven thousand, two hundred eleven".