125201221 has 2 divisors, whose sum is σ = 125201222. Its totient is φ = 125201220.

The previous prime is 125201201. The next prime is 125201231. The reversal of 125201221 is 122102521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75498721 + 49702500 = 8689^2 + 7050^2 .

It is a cyclic number.

It is not a de Polignac number, because 125201221 - 2⁷ = 125201093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125201195 and 125201204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125201201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62600610 + 62600611.

It is an arithmetic number, because the mean of its divisors is an integer number (62600611).

Almost surely, 2^125201221 is an apocalyptic number.

It is an amenable number.

125201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

125201221 is an equidigital number, since it uses as much as digits as its factorization.

125201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 125201221 is about 11189.3351455750. The cubic root of 125201221 is about 500.2681508312.

Adding to 125201221 its reverse (122102521), we get a palindrome (247303742).

The spelling of 125201221 in words is "one hundred twenty-five million, two hundred one thousand, two hundred twenty-one".