12121312597 has 2 divisors, whose sum is σ = 12121312598. Its totient is φ = 12121312596.

The previous prime is 12121312531. The next prime is 12121312601. The reversal of 12121312597 is 79521312121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9040396561 + 3080916036 = 95081^2 + 55506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121312597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121312897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060656298 + 6060656299.

It is an arithmetic number, because the mean of its divisors is an integer number (6060656299).

Almost surely, 2^12121312597 is an apocalyptic number.

It is an amenable number.

12121312597 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121312597 is an equidigital number, since it uses as much as digits as its factorization.

12121312597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

The spelling of 12121312597 in words is "twelve billion, one hundred twenty-one million, three hundred twelve thousand, five hundred ninety-seven".