12503131357 has 2 divisors, whose sum is σ = 12503131358. Its totient is φ = 12503131356.

The previous prime is 12503131351. The next prime is 12503131363. The reversal of 12503131357 is 75313130521.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (12503131351) and next prime (12503131363).

It can be written as a sum of positive squares in only one way, i.e., 12387912601 + 115218756 = 111301^2 + 10734^2 .

It is an emirp because it is prime and its reverse (75313130521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12503131357 is a prime.

It is a super-3 number, since 3×12503131357³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12503131351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251565678 + 6251565679.

It is an arithmetic number, because the mean of its divisors is an integer number (6251565679).

Almost surely, 2^12503131357 is an apocalyptic number.

It is an amenable number.

12503131357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12503131357 is an equidigital number, since it uses as much as digits as its factorization.

12503131357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 31.

Adding to 12503131357 its reverse (75313130521), we get a palindrome (87816261878).

The spelling of 12503131357 in words is "twelve billion, five hundred three million, one hundred thirty-one thousand, three hundred fifty-seven".