125221424005 has 24 divisors (see below), whose sum is σ = 151407382392. Its totient is φ = 99420506496.

The previous prime is 125221423919. The next prime is 125221424017. The reversal of 125221424005 is 500424122521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12067901316 + 113153522689 = 109854^2 + 336383^2 .

It is not a de Polignac number, because 125221424005 - 2¹¹ = 125221421957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204276079 + ... + 204276691.

It is an arithmetic number, because the mean of its divisors is an integer number (6308640933).

Almost surely, 2^125221424005 is an apocalyptic number.

It is an amenable number.

125221424005 is a deficient number, since it is larger than the sum of its proper divisors (26185958387).

125221424005 is an frugal number, since it uses more digits than its factorization.

125221424005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 125221424005 its reverse (500424122521), we get a palindrome (625645546526).

The spelling of 125221424005 in words is "one hundred twenty-five billion, two hundred twenty-one million, four hundred twenty-four thousand, five".