123005530353221 has 2 divisors, whose sum is σ = 123005530353222. Its totient is φ = 123005530353220.

The previous prime is 123005530353217. The next prime is 123005530353253. The reversal of 123005530353221 is 122353035500321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109491738268900 + 13513792084321 = 10463830^2 + 3676111^2 .

It is a cyclic number.

It is not a de Polignac number, because 123005530353221 - 2² = 123005530353217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123005530353271) 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, 61502765176610 + 61502765176611.

It is an arithmetic number, because the mean of its divisors is an integer number (61502765176611).

Almost surely, 2^{123005530353221} is an apocalyptic number.

It is an amenable number.

123005530353221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123005530353221 is an equidigital number, since it uses as much as digits as its factorization.

123005530353221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 35.

Adding to 123005530353221 its reverse (122353035500321), we get a palindrome (245358565853542).

The spelling of 123005530353221 in words is "one hundred twenty-three trillion, five billion, five hundred thirty million, three hundred fifty-three thousand, two hundred twenty-one".