12321531037 has 2 divisors, whose sum is σ = 12321531038. Its totient is φ = 12321531036.

The previous prime is 12321530999. The next prime is 12321531073. The reversal of 12321531037 is 73013512321.

Together with next prime (12321531073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9537280281 + 2784250756 = 97659^2 + 52766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12321531037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321530996 and 12321531014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321571037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160765518 + 6160765519.

It is an arithmetic number, because the mean of its divisors is an integer number (6160765519).

Almost surely, 2^12321531037 is an apocalyptic number.

It is an amenable number.

12321531037 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321531037 is an equidigital number, since it uses as much as digits as its factorization.

12321531037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The spelling of 12321531037 in words is "twelve billion, three hundred twenty-one million, five hundred thirty-one thousand, thirty-seven".