265426453620121 has 2 divisors, whose sum is σ = 265426453620122. Its totient is φ = 265426453620120.

The previous prime is 265426453620091. The next prime is 265426453620169. The reversal of 265426453620121 is 121026354624562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262363379593225 + 3063074026896 = 16197635^2 + 1750164^2 .

It is a cyclic number.

It is not a de Polignac number, because 265426453620121 - 2¹⁷ = 265426453489049 is a prime.

It is not a weakly prime, because it can be changed into another prime (265426453620191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132713226810060 + 132713226810061.

It is an arithmetic number, because the mean of its divisors is an integer number (132713226810061).

Almost surely, 2^{265426453620121} is an apocalyptic number.

It is an amenable number.

265426453620121 is a deficient number, since it is larger than the sum of its proper divisors (1).

265426453620121 is an equidigital number, since it uses as much as digits as its factorization.

265426453620121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 265426453620121 in words is "two hundred sixty-five trillion, four hundred twenty-six billion, four hundred fifty-three million, six hundred twenty thousand, one hundred twenty-one".