125105021205 has 16 divisors (see below), whose sum is σ = 200527415424. Its totient is φ = 66602884160.

The previous prime is 125105021203. The next prime is 125105021243. The reversal of 125105021205 is 502120501521.

It is not a de Polignac number, because 125105021205 - 2¹ = 125105021203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125105021203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7478481 + ... + 7495190.

It is an arithmetic number, because the mean of its divisors is an integer number (12532963464).

Almost surely, 2^125105021205 is an apocalyptic number.

125105021205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125105021205 is a deficient number, since it is larger than the sum of its proper divisors (75422394219).

125105021205 is a wasteful number, since it uses less digits than its factorization.

125105021205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14974236.

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 125105021205 its reverse (502120501521), we get a palindrome (627225522726).

The spelling of 125105021205 in words is "one hundred twenty-five billion, one hundred five million, twenty-one thousand, two hundred five".