265252476001221 has 10 divisors (see below), whose sum is σ = 396241353038982. Its totient is φ = 176834984000760.

The previous prime is 265252476001187. The next prime is 265252476001229. The reversal of 265252476001221 is 122100674252562.

265252476001221 is a `hidden beast` number, since 2 + 6 + 5 + 2 + 5 + 2 + 4 + 7 + 600 + 12 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 252050233688100 + 13202242313121 = 15876090^2 + 3633489^2 .

It is not a de Polignac number, because 265252476001221 - 2⁶ = 265252476001157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265252476001229) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1637360962890 + ... + 1637360963051.

Almost surely, 2^{265252476001221} is an apocalyptic number.

It is an amenable number.

265252476001221 is a deficient number, since it is larger than the sum of its proper divisors (130988877037761).

265252476001221 is an equidigital number, since it uses as much as digits as its factorization.

265252476001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274721925953 (or 3274721925944 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 265252476001221 in words is "two hundred sixty-five trillion, two hundred fifty-two billion, four hundred seventy-six million, one thousand, two hundred twenty-one".