125355322321 has 2 divisors, whose sum is σ = 125355322322. Its totient is φ = 125355322320.

The previous prime is 125355322319. The next prime is 125355322331. The reversal of 125355322321 is 123223553521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123837129025 + 1518193296 = 351905^2 + 38964^2 .

It is an emirp because it is prime and its reverse (123223553521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125355322321 - 2¹ = 125355322319 is a prime.

Together with 125355322319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (125355322331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62677661160 + 62677661161.

It is an arithmetic number, because the mean of its divisors is an integer number (62677661161).

Almost surely, 2^125355322321 is an apocalyptic number.

It is an amenable number.

125355322321 is a deficient number, since it is larger than the sum of its proper divisors (1).

125355322321 is an equidigital number, since it uses as much as digits as its factorization.

125355322321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 34.

Adding to 125355322321 its reverse (123223553521), we get a palindrome (248578875842).

The spelling of 125355322321 in words is "one hundred twenty-five billion, three hundred fifty-five million, three hundred twenty-two thousand, three hundred twenty-one".