12501031321 has 2 divisors, whose sum is σ = 12501031322. Its totient is φ = 12501031320.

The previous prime is 12501031289. The next prime is 12501031339. The reversal of 12501031321 is 12313010521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7936137225 + 4564894096 = 89085^2 + 67564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12501031321 - 2⁵ = 12501031289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12501031351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250515660 + 6250515661.

It is an arithmetic number, because the mean of its divisors is an integer number (6250515661).

Almost surely, 2^12501031321 is an apocalyptic number.

It is an amenable number.

12501031321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501031321 is an equidigital number, since it uses as much as digits as its factorization.

12501031321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 12501031321 its reverse (12313010521), we get a palindrome (24814041842).

The spelling of 12501031321 in words is "twelve billion, five hundred one million, thirty-one thousand, three hundred twenty-one".