125221424017 has 2 divisors, whose sum is σ = 125221424018. Its totient is φ = 125221424016.

The previous prime is 125221423919. The next prime is 125221424033. The reversal of 125221424017 is 710424122521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82302429456 + 42918994561 = 286884^2 + 207169^2 .

It is a cyclic number.

It is not a de Polignac number, because 125221424017 - 2¹⁵ = 125221391249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125221424017.

It is not a weakly prime, because it can be changed into another prime (125221424717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62610712008 + 62610712009.

It is an arithmetic number, because the mean of its divisors is an integer number (62610712009).

Almost surely, 2^125221424017 is an apocalyptic number.

It is an amenable number.

125221424017 is a deficient number, since it is larger than the sum of its proper divisors (1).

125221424017 is an equidigital number, since it uses as much as digits as its factorization.

125221424017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

Adding to 125221424017 its reverse (710424122521), we get a palindrome (835645546538).

The spelling of 125221424017 in words is "one hundred twenty-five billion, two hundred twenty-one million, four hundred twenty-four thousand, seventeen".