12355021999997 has 2 divisors, whose sum is σ = 12355021999998. Its totient is φ = 12355021999996.

The previous prime is 12355021999979. The next prime is 12355022000003. The reversal of 12355021999997 is 79999912055321.

Together with previous prime (12355021999979) 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., 8269040852836 + 4085981147161 = 2875594^2 + 2021381^2 .

It is a cyclic number.

It is not a de Polignac number, because 12355021999997 - 2⁸ = 12355021999741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12355021999997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12355021992997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177510999998 + 6177510999999.

It is an arithmetic number, because the mean of its divisors is an integer number (6177510999999).

Almost surely, 2^{12355021999997} is an apocalyptic number.

It is an amenable number.

12355021999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355021999997 is an equidigital number, since it uses as much as digits as its factorization.

12355021999997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124002900, while the sum is 71.

The spelling of 12355021999997 in words is "twelve trillion, three hundred fifty-five billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-seven".