125145130321 has 2 divisors, whose sum is σ = 125145130322. Its totient is φ = 125145130320.

The previous prime is 125145130289. The next prime is 125145130339. The reversal of 125145130321 is 123031541521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98163782721 + 26981347600 = 313311^2 + 164260^2 .

It is a cyclic number.

It is not a de Polignac number, because 125145130321 - 2⁵ = 125145130289 is a prime.

It is a super-2 number, since 2×125145130321² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125145130321.

It is not a weakly prime, because it can be changed into another prime (125145130361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62572565160 + 62572565161.

It is an arithmetic number, because the mean of its divisors is an integer number (62572565161).

Almost surely, 2^125145130321 is an apocalyptic number.

It is an amenable number.

125145130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

125145130321 is an equidigital number, since it uses as much as digits as its factorization.

125145130321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 125145130321 its reverse (123031541521), we get a palindrome (248176671842).

The spelling of 125145130321 in words is "one hundred twenty-five billion, one hundred forty-five million, one hundred thirty thousand, three hundred twenty-one".