2126318455813 has 2 divisors, whose sum is σ = 2126318455814. Its totient is φ = 2126318455812.

The previous prime is 2126318455721. The next prime is 2126318455853. The reversal of 2126318455813 is 3185548136212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254003551329 + 872314904484 = 1119823^2 + 933978^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126318455813 - 2¹³ = 2126318447621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126318455853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063159227906 + 1063159227907.

It is an arithmetic number, because the mean of its divisors is an integer number (1063159227907).

Almost surely, 2^{2126318455813} is an apocalyptic number.

It is an amenable number.

2126318455813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126318455813 is an equidigital number, since it uses as much as digits as its factorization.

2126318455813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 49.

The spelling of 2126318455813 in words is "two trillion, one hundred twenty-six billion, three hundred eighteen million, four hundred fifty-five thousand, eight hundred thirteen".