12013123211 has 2 divisors, whose sum is σ = 12013123212. Its totient is φ = 12013123210.

The previous prime is 12013123201. The next prime is 12013123351. The reversal of 12013123211 is 11232131021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12013123211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12013123211.

It is not a weakly prime, because it can be changed into another prime (12013123201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006561605 + 6006561606.

It is an arithmetic number, because the mean of its divisors is an integer number (6006561606).

Almost surely, 2^12013123211 is an apocalyptic number.

12013123211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013123211 is an equidigital number, since it uses as much as digits as its factorization.

12013123211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12013123211 its reverse (11232131021), we get a palindrome (23245254232).

The spelling of 12013123211 in words is "twelve billion, thirteen million, one hundred twenty-three thousand, two hundred eleven".