252244405223121 has 4 divisors (see below), whose sum is σ = 336325873630832. Its totient is φ = 168162936815412.

The previous prime is 252244405223099. The next prime is 252244405223297. The reversal of 252244405223121 is 121322504442252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252244405223121 - 2³⁹ = 251694649409233 is a prime.

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 252244405223121.

It is not an unprimeable number, because it can be changed into a prime (252244405223521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42040734203851 + ... + 42040734203856.

It is an arithmetic number, because the mean of its divisors is an integer number (84081468407708).

Almost surely, 2^{252244405223121} is an apocalyptic number.

It is an amenable number.

252244405223121 is a deficient number, since it is larger than the sum of its proper divisors (84081468407711).

252244405223121 is an equidigital number, since it uses as much as digits as its factorization.

252244405223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84081468407710.

The product of its (nonzero) digits is 307200, while the sum is 39.

Adding to 252244405223121 its reverse (121322504442252), we get a palindrome (373566909665373).

The spelling of 252244405223121 in words is "two hundred fifty-two trillion, two hundred forty-four billion, four hundred five million, two hundred twenty-three thousand, one hundred twenty-one".