135523402232321 has 4 divisors (see below), whose sum is σ = 135734827197444. Its totient is φ = 135311977267200.

The previous prime is 135523402232269. The next prime is 135523402232363. The reversal of 135523402232321 is 123232204325531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50293116631696 + 85230285600625 = 7091764^2 + 9232025^2 .

It is a cyclic number.

It is not a de Polignac number, because 135523402232321 - 2³⁸ = 135248524325377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135523402232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105712481600 + ... + 105712482881.

It is an arithmetic number, because the mean of its divisors is an integer number (33933706799361).

Almost surely, 2^{135523402232321} is an apocalyptic number.

It is an amenable number.

135523402232321 is a deficient number, since it is larger than the sum of its proper divisors (211424965123).

135523402232321 is an equidigital number, since it uses as much as digits as its factorization.

135523402232321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211424965122.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 135523402232321 its reverse (123232204325531), we get a palindrome (258755606557852).

The spelling of 135523402232321 in words is "one hundred thirty-five trillion, five hundred twenty-three billion, four hundred two million, two hundred thirty-two thousand, three hundred twenty-one".