125205421201 has 32 divisors (see below), whose sum is σ = 149240044800. Its totient is φ = 102819870720.

The previous prime is 125205421177. The next prime is 125205421207. The reversal of 125205421201 is 102124502521.

It is not a de Polignac number, because 125205421201 - 2⁵ = 125205421169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125205421207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3517270 + ... + 3552688.

It is an arithmetic number, because the mean of its divisors is an integer number (4663751400).

Almost surely, 2^125205421201 is an apocalyptic number.

It is an amenable number.

125205421201 is a deficient number, since it is larger than the sum of its proper divisors (24034623599).

125205421201 is a wasteful number, since it uses less digits than its factorization.

125205421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35689.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 125205421201 its reverse (102124502521), we get a palindrome (227329923722).

The spelling of 125205421201 in words is "one hundred twenty-five billion, two hundred five million, four hundred twenty-one thousand, two hundred one".