252240322121 has 4 divisors (see below), whose sum is σ = 263207292672. Its totient is φ = 241273351572.

The previous prime is 252240322099. The next prime is 252240322127. The reversal of 252240322121 is 121223042252.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252240322121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252240322127) 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, 5483485241 + ... + 5483485286.

It is an arithmetic number, because the mean of its divisors is an integer number (65801823168).

Almost surely, 2^252240322121 is an apocalyptic number.

It is an amenable number.

252240322121 is a deficient number, since it is larger than the sum of its proper divisors (10966970551).

252240322121 is a wasteful number, since it uses less digits than its factorization.

252240322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966970550.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 252240322121 its reverse (121223042252), we get a palindrome (373463364373).

The spelling of 252240322121 in words is "two hundred fifty-two billion, two hundred forty million, three hundred twenty-two thousand, one hundred twenty-one".