12120533125 has 10 divisors (see below), whose sum is σ = 15145818974. Its totient is φ = 9696426000.

The previous prime is 12120533111. The next prime is 12120533141. The reversal of 12120533125 is 52133502121.

It can be written as a sum of positive squares in 5 ways, for example, as 2088307204 + 10032225921 = 45698^2 + 100161^2 .

It is not a de Polignac number, because 12120533125 - 2¹⁷ = 12120402053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120533125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9695802 + ... + 9697051.

Almost surely, 2^12120533125 is an apocalyptic number.

It is an amenable number.

12120533125 is a deficient number, since it is larger than the sum of its proper divisors (3025285849).

12120533125 is an frugal number, since it uses more digits than its factorization.

12120533125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392873 (or 19392858 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 12120533125 in words is "twelve billion, one hundred twenty million, five hundred thirty-three thousand, one hundred twenty-five".