251212113255013 has 2 divisors, whose sum is σ = 251212113255014. Its totient is φ = 251212113255012.

The previous prime is 251212113254953. The next prime is 251212113255029. The reversal of 251212113255013 is 310552311212152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207177966367684 + 44034146887329 = 14393678^2 + 6635823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251212113255013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251212113255013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251212113255613) 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, 125606056627506 + 125606056627507.

It is an arithmetic number, because the mean of its divisors is an integer number (125606056627507).

Almost surely, 2^{251212113255013} is an apocalyptic number.

It is an amenable number.

251212113255013 is a deficient number, since it is larger than the sum of its proper divisors (1).

251212113255013 is an equidigital number, since it uses as much as digits as its factorization.

251212113255013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 251212113255013 its reverse (310552311212152), we get a palindrome (561764424467165).

The spelling of 251212113255013 in words is "two hundred fifty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred fifty-five thousand, thirteen".