12125121 has 8 divisors (see below), whose sum is σ = 16226304. Its totient is φ = 8053680.

The previous prime is 12125101. The next prime is 12125129. The reversal of 12125121 is 12152121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12125121 - 2⁷ = 12124993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12125121.

It is not an unprimeable number, because it can be changed into a prime (12125129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6465 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (2028288).

Almost surely, 2^12125121 is an apocalyptic number.

It is an amenable number.

12125121 is a deficient number, since it is larger than the sum of its proper divisors (4101183).

12125121 is a wasteful number, since it uses less digits than its factorization.

12125121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14871.

The product of its digits is 40, while the sum is 15.

The square root of 12125121 is about 3482.1144438401. The cubic root of 12125121 is about 229.7358088124.

Adding to 12125121 its reverse (12152121), we get a palindrome (24277242).

Subtracting 12125121 from its reverse (12152121), we obtain a cube (27000 = 30³).

It can be divided in two parts, 12125 and 121, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 12125121 in words is "twelve million, one hundred twenty-five thousand, one hundred twenty-one".