260202137254321 has 2 divisors, whose sum is σ = 260202137254322. Its totient is φ = 260202137254320.

The previous prime is 260202137254309. The next prime is 260202137254327. The reversal of 260202137254321 is 123452731202062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239861541151296 + 20340596103025 = 15487464^2 + 4510055^2 .

It is a cyclic number.

It is not a de Polignac number, because 260202137254321 - 2²⁷ = 260202003036593 is a prime.

It is not a weakly prime, because it can be changed into another prime (260202137254327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130101068627160 + 130101068627161.

It is an arithmetic number, because the mean of its divisors is an integer number (130101068627161).

Almost surely, 2^{260202137254321} is an apocalyptic number.

It is an amenable number.

260202137254321 is a deficient number, since it is larger than the sum of its proper divisors (1).

260202137254321 is an equidigital number, since it uses as much as digits as its factorization.

260202137254321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 260202137254321 its reverse (123452731202062), we get a palindrome (383654868456383).

The spelling of 260202137254321 in words is "two hundred sixty trillion, two hundred two billion, one hundred thirty-seven million, two hundred fifty-four thousand, three hundred twenty-one".