12552121 has 2 divisors, whose sum is σ = 12552122. Its totient is φ = 12552120.

The previous prime is 12552097. The next prime is 12552143. The reversal of 12552121 is 12125521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6574096 + 5978025 = 2564^2 + 2445^2 .

It is an emirp because it is prime and its reverse (12125521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12552121 - 2¹¹ = 12550073 is a prime.

It is not a weakly prime, because it can be changed into another prime (12552151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6276060 + 6276061.

It is an arithmetic number, because the mean of its divisors is an integer number (6276061).

Almost surely, 2^12552121 is an apocalyptic number.

It is an amenable number.

12552121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12552121 is an equidigital number, since it uses as much as digits as its factorization.

12552121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 19.

The square root of 12552121 is about 3542.8972607176. The cubic root of 12552121 is about 232.4015600532.

Adding to 12552121 its reverse (12125521), we get a palindrome (24677642).

The spelling of 12552121 in words is "twelve million, five hundred fifty-two thousand, one hundred twenty-one".