2125217123 has 2 divisors, whose sum is σ = 2125217124. Its totient is φ = 2125217122.

The previous prime is 2125217113. The next prime is 2125217131. The reversal of 2125217123 is 3217125212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125217123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2125217092 and 2125217101.

It is not a weakly prime, because it can be changed into another prime (2125217113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062608561 + 1062608562.

It is an arithmetic number, because the mean of its divisors is an integer number (1062608562).

Almost surely, 2^2125217123 is an apocalyptic number.

2125217123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125217123 is an equidigital number, since it uses as much as digits as its factorization.

2125217123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 2125217123 is about 46100.0772559006. The cubic root of 2125217123 is about 1285.6845808475.

The spelling of 2125217123 in words is "two billion, one hundred twenty-five million, two hundred seventeen thousand, one hundred twenty-three".