125223221 has 4 divisors (see below), whose sum is σ = 125915244. Its totient is φ = 124531200.

The previous prime is 125223211. The next prime is 125223271. The reversal of 125223221 is 122322521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122322521 = 439 ⋅278639.

It can be written as a sum of positive squares in 2 ways, for example, as 6195121 + 119028100 = 2489^2 + 10910^2 .

It is a cyclic number.

It is not a de Polignac number, because 125223221 - 2⁶ = 125223157 is a prime.

It is a super-2 number, since 2×125223221² = 31361710155229682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125223193 and 125223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125223211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345740 + ... + 346101.

It is an arithmetic number, because the mean of its divisors is an integer number (31478811).

Almost surely, 2^125223221 is an apocalyptic number.

It is an amenable number.

125223221 is a deficient number, since it is larger than the sum of its proper divisors (692023).

125223221 is an equidigital number, since it uses as much as digits as its factorization.

125223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692022.

The product of its digits is 480, while the sum is 20.

The square root of 125223221 is about 11190.3181813566. The cubic root of 125223221 is about 500.2974510107.

Adding to 125223221 its reverse (122322521), we get a palindrome (247545742).

The spelling of 125223221 in words is "one hundred twenty-five million, two hundred twenty-three thousand, two hundred twenty-one".