12000001231 has 2 divisors, whose sum is σ = 12000001232. Its totient is φ = 12000001230.

The previous prime is 12000001159. The next prime is 12000001249. The reversal of 12000001231 is 13210000021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12000001231 is a prime.

It is a super-2 number, since 2×12000001231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12000001291) 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 as a sum of consecutive naturals, namely, 6000000615 + 6000000616.

It is an arithmetic number, because the mean of its divisors is an integer number (6000000616).

Almost surely, 2^12000001231 is an apocalyptic number.

12000001231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000001231 is an equidigital number, since it uses as much as digits as its factorization.

12000001231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 12000001231 its reverse (13210000021), we get a palindrome (25210001252).

The spelling of 12000001231 in words is "twelve billion, one thousand, two hundred thirty-one".