12064031821 has 2 divisors, whose sum is σ = 12064031822. Its totient is φ = 12064031820.

The previous prime is 12064031803. The next prime is 12064031849. The reversal of 12064031821 is 12813046021.

It is an a-pointer prime, because the next prime (12064031849) can be obtained adding 12064031821 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7063562025 + 5000469796 = 84045^2 + 70714^2 .

It is an emirp because it is prime and its reverse (12813046021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12064031821 - 2²³ = 12055643213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12064031821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12064001821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6032015910 + 6032015911.

It is an arithmetic number, because the mean of its divisors is an integer number (6032015911).

Almost surely, 2^12064031821 is an apocalyptic number.

It is an amenable number.

12064031821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12064031821 is an equidigital number, since it uses as much as digits as its factorization.

12064031821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 12064031821 its reverse (12813046021), we get a palindrome (24877077842).

The spelling of 12064031821 in words is "twelve billion, sixty-four million, thirty-one thousand, eight hundred twenty-one".