12131213132501 has 2 divisors, whose sum is σ = 12131213132502. Its totient is φ = 12131213132500.

The previous prime is 12131213132491. The next prime is 12131213132537. The reversal of 12131213132501 is 10523131213121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12125723804401 + 5489328100 = 3482201^2 + 74090^2 .

It is an emirp because it is prime and its reverse (10523131213121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12131213132501 - 2²⁶ = 12131146023637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131213132581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065606566250 + 6065606566251.

It is an arithmetic number, because the mean of its divisors is an integer number (6065606566251).

Almost surely, 2^{12131213132501} is an apocalyptic number.

It is an amenable number.

12131213132501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131213132501 is an equidigital number, since it uses as much as digits as its factorization.

12131213132501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 12131213132501 its reverse (10523131213121), we get a palindrome (22654344345622).

The spelling of 12131213132501 in words is "twelve trillion, one hundred thirty-one billion, two hundred thirteen million, one hundred thirty-two thousand, five hundred one".