25130123281 has 2 divisors, whose sum is σ = 25130123282. Its totient is φ = 25130123280.

The previous prime is 25130123279. The next prime is 25130123341. The reversal of 25130123281 is 18232103152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16766106256 + 8364017025 = 129484^2 + 91455^2 .

It is a cyclic number.

It is not a de Polignac number, because 25130123281 - 2¹ = 25130123279 is a prime.

It is a super-2 number, since 2×25130123281² (a number of 22 digits) contains 22 as substring.

Together with 25130123279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25130123251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565061640 + 12565061641.

It is an arithmetic number, because the mean of its divisors is an integer number (12565061641).

Almost surely, 2^25130123281 is an apocalyptic number.

It is an amenable number.

25130123281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25130123281 is an equidigital number, since it uses as much as digits as its factorization.

25130123281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 25130123281 in words is "twenty-five billion, one hundred thirty million, one hundred twenty-three thousand, two hundred eighty-one".