115455413405221 has 2 divisors, whose sum is σ = 115455413405222. Its totient is φ = 115455413405220.

The previous prime is 115455413405207. The next prime is 115455413405239. The reversal of 115455413405221 is 122504314554511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58843167064900 + 56612246340321 = 7670930^2 + 7524111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115455413405221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115455413405201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57727706702610 + 57727706702611.

It is an arithmetic number, because the mean of its divisors is an integer number (57727706702611).

Almost surely, 2^{115455413405221} is an apocalyptic number.

It is an amenable number.

115455413405221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115455413405221 is an equidigital number, since it uses as much as digits as its factorization.

115455413405221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480000, while the sum is 43.

Adding to 115455413405221 its reverse (122504314554511), we get a palindrome (237959727959732).

The spelling of 115455413405221 in words is "one hundred fifteen trillion, four hundred fifty-five billion, four hundred thirteen million, four hundred five thousand, two hundred twenty-one".