125603502201 has 20 divisors (see below), whose sum is σ = 187658209332. Its totient is φ = 83723044608.

The previous prime is 125603502137. The next prime is 125603502263. The reversal of 125603502201 is 102205306521.

It is a happy number.

125603502201 is a `hidden beast` number, since 1 + 2 + 5 + 603 + 50 + 2 + 2 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 80244725625 + 45358776576 = 283275^2 + 212976^2 .

It is not a de Polignac number, because 125603502201 - 2⁶ = 125603502137 is a prime.

It is a super-2 number, since 2×125603502201² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (125603500201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 440005 + ... + 666941.

Almost surely, 2^125603502201 is an apocalyptic number.

It is an amenable number.

125603502201 is a deficient number, since it is larger than the sum of its proper divisors (62054707131).

125603502201 is an equidigital number, since it uses as much as digits as its factorization.

125603502201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233782 (or 233773 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 125603502201 its reverse (102205306521), we get a palindrome (227808808722).

The spelling of 125603502201 in words is "one hundred twenty-five billion, six hundred three million, five hundred two thousand, two hundred one".