12120002121137 has 2 divisors, whose sum is σ = 12120002121138. Its totient is φ = 12120002121136.

The previous prime is 12120002121083. The next prime is 12120002121163. The reversal of 12120002121137 is 73112120002121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11415215006881 + 704787114256 = 3378641^2 + 839516^2 .

It is an emirp because it is prime and its reverse (73112120002121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120002121137 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120002127137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060001060568 + 6060001060569.

It is an arithmetic number, because the mean of its divisors is an integer number (6060001060569).

Almost surely, 2^{12120002121137} is an apocalyptic number.

It is an amenable number.

12120002121137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120002121137 is an equidigital number, since it uses as much as digits as its factorization.

12120002121137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 12120002121137 its reverse (73112120002121), we get a palindrome (85232122123258).

The spelling of 12120002121137 in words is "twelve trillion, one hundred twenty billion, two million, one hundred twenty-one thousand, one hundred thirty-seven".