265299000121 has 2 divisors, whose sum is σ = 265299000122. Its totient is φ = 265299000120.

The previous prime is 265299000103. The next prime is 265299000133. The reversal of 265299000121 is 121000992562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169691268096 + 95607732025 = 411936^2 + 309205^2 .

It is a cyclic number.

It is not a de Polignac number, because 265299000121 - 2¹⁹ = 265298475833 is a prime.

It is not a weakly prime, because it can be changed into another prime (265299006121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132649500060 + 132649500061.

It is an arithmetic number, because the mean of its divisors is an integer number (132649500061).

Almost surely, 2^265299000121 is an apocalyptic number.

It is an amenable number.

265299000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

265299000121 is an equidigital number, since it uses as much as digits as its factorization.

265299000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

Adding to 265299000121 its reverse (121000992562), we get a palindrome (386299992683).

The spelling of 265299000121 in words is "two hundred sixty-five billion, two hundred ninety-nine million, one hundred twenty-one", and thus it is an aban number.