12120909025 has 27 divisors (see below), whose sum is σ = 15253667769. Its totient is φ = 9554484480.

The previous prime is 12120909023. The next prime is 12120909079. The reversal of 12120909025 is 52090902121.

The square root of 12120909025 is 110095.

It is a perfect power (a square), and thus also a powerful number.

12120909025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 445674321 + 11675234704 = 21111^2 + 108052^2 .

It is not a de Polignac number, because 12120909025 - 2¹ = 12120909023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120909023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 53395962 + ... + 53396188.

Almost surely, 2^12120909025 is an apocalyptic number.

12120909025 is the 110095-th square number.

12120909025 is the 55048-th centered octagonal number.

It is an amenable number.

12120909025 is a deficient number, since it is larger than the sum of its proper divisors (3132758744).

12120909025 is an frugal number, since it uses more digits than its factorization.

12120909025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 12120909025 in words is "twelve billion, one hundred twenty million, nine hundred nine thousand, twenty-five".