12550121 has 4 divisors (see below), whose sum is σ = 12634500. Its totient is φ = 12465744.

The previous prime is 12550099. The next prime is 12550123. The reversal of 12550121 is 12105521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1125721 + 11424400 = 1061^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12550121 - 2¹⁴ = 12533737 is a prime.

It is a super-2 number, since 2×12550121² = 315011074229282, which contains 22 as substring.

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 12550121.

It is not an unprimeable number, because it can be changed into a prime (12550123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41966 + ... + 42263.

It is an arithmetic number, because the mean of its divisors is an integer number (3158625).

Almost surely, 2^12550121 is an apocalyptic number.

It is an amenable number.

12550121 is a deficient number, since it is larger than the sum of its proper divisors (84379).

12550121 is an equidigital number, since it uses as much as digits as its factorization.

12550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84378.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12550121 is about 3542.6149946050. The cubic root of 12550121 is about 232.3892161153.

Adding to 12550121 its reverse (12105521), we get a palindrome (24655642).

The spelling of 12550121 in words is "twelve million, five hundred fifty thousand, one hundred twenty-one".