12125211025 has 48 divisors (see below), whose sum is σ = 15745086000. Its totient is φ = 9251343360.

The previous prime is 12125211023. The next prime is 12125211031. The reversal of 12125211025 is 52011252121.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 5415635281 + 6709575744 = 73591^2 + 81912^2 .

It is not a de Polignac number, because 12125211025 - 2¹ = 12125211023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12125210987 and 12125211005.

It is not an unprimeable number, because it can be changed into a prime (12125211023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34742551 + ... + 34742899.

It is an arithmetic number, because the mean of its divisors is an integer number (328022625).

Almost surely, 2^12125211025 is an apocalyptic number.

It is an amenable number.

12125211025 is a deficient number, since it is larger than the sum of its proper divisors (3619874975).

12125211025 is a wasteful number, since it uses less digits than its factorization.

12125211025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 12125211025 its reverse (52011252121), we get a palindrome (64136463146).

The spelling of 12125211025 in words is "twelve billion, one hundred twenty-five million, two hundred eleven thousand, twenty-five".