115454144204221 has 2 divisors, whose sum is σ = 115454144204222. Its totient is φ = 115454144204220.

The previous prime is 115454144204197. The next prime is 115454144204297. The reversal of 115454144204221 is 122402441454511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99503218516900 + 15950925687321 = 9975130^2 + 3993861^2 .

It is a cyclic number.

It is not a de Polignac number, because 115454144204221 - 2¹⁹ = 115454143679933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115454144204621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57727072102110 + 57727072102111.

It is an arithmetic number, because the mean of its divisors is an integer number (57727072102111).

Almost surely, 2^{115454144204221} is an apocalyptic number.

It is an amenable number.

115454144204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115454144204221 is an equidigital number, since it uses as much as digits as its factorization.

115454144204221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204800, while the sum is 40.

Adding to 115454144204221 its reverse (122402441454511), we get a palindrome (237856585658732).

The spelling of 115454144204221 in words is "one hundred fifteen trillion, four hundred fifty-four billion, one hundred forty-four million, two hundred four thousand, two hundred twenty-one".