2125421066917 has 2 divisors, whose sum is σ = 2125421066918. Its totient is φ = 2125421066916.

The previous prime is 2125421066851. The next prime is 2125421066929. The reversal of 2125421066917 is 7196601245212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1459955057796 + 665466009121 = 1208286^2 + 815761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125421066917 - 2¹⁹ = 2125420542629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125421066947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062710533458 + 1062710533459.

It is an arithmetic number, because the mean of its divisors is an integer number (1062710533459).

Almost surely, 2^{2125421066917} is an apocalyptic number.

It is an amenable number.

2125421066917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125421066917 is an equidigital number, since it uses as much as digits as its factorization.

2125421066917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 2125421066917 in words is "two trillion, one hundred twenty-five billion, four hundred twenty-one million, sixty-six thousand, nine hundred seventeen".