12012320077 has 2 divisors, whose sum is σ = 12012320078. Its totient is φ = 12012320076.

The previous prime is 12012319987. The next prime is 12012320093. The reversal of 12012320077 is 77002321021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9493384356 + 2518935721 = 97434^2 + 50189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012320077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012320977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006160038 + 6006160039.

It is an arithmetic number, because the mean of its divisors is an integer number (6006160039).

Almost surely, 2^12012320077 is an apocalyptic number.

It is an amenable number.

12012320077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012320077 is an equidigital number, since it uses as much as digits as its factorization.

12012320077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

Adding to 12012320077 its reverse (77002321021), we get a palindrome (89014641098).

The spelling of 12012320077 in words is "twelve billion, twelve million, three hundred twenty thousand, seventy-seven".