125103221 has 4 divisors (see below), whose sum is σ = 132462252. Its totient is φ = 117744192.

The previous prime is 125103217. The next prime is 125103257. The reversal of 125103221 is 122301521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122301521 = 331 ⋅369491.

It can be written as a sum of positive squares in 2 ways, for example, as 58354321 + 66748900 = 7639^2 + 8170^2 .

It is a cyclic number.

It is not a de Polignac number, because 125103221 - 2² = 125103217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7359013 = 125103221 / (1 + 2 + 5 + 1 + 0 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125103521) 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 in 3 ways as a sum of consecutive naturals, for example, 3679490 + ... + 3679523.

It is an arithmetic number, because the mean of its divisors is an integer number (33115563).

Almost surely, 2^125103221 is an apocalyptic number.

It is an amenable number.

125103221 is a deficient number, since it is larger than the sum of its proper divisors (7359031).

125103221 is an equidigital number, since it uses as much as digits as its factorization.

125103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359030.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 125103221 is about 11184.9551183722. The cubic root of 125103221 is about 500.1375901344.

Adding to 125103221 its reverse (122301521), we get a palindrome (247404742).

The spelling of 125103221 in words is "one hundred twenty-five million, one hundred three thousand, two hundred twenty-one".