135421024345121 has 4 divisors (see below), whose sum is σ = 135421054364352. Its totient is φ = 135420994325892.

The previous prime is 135421024345073. The next prime is 135421024345151. The reversal of 135421024345121 is 121543420124531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135421024345121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135421024345151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6714965 + ... + 17774498.

It is an arithmetic number, because the mean of its divisors is an integer number (33855263591088).

Almost surely, 2^{135421024345121} is an apocalyptic number.

It is an amenable number.

135421024345121 is a deficient number, since it is larger than the sum of its proper divisors (30019231).

135421024345121 is an equidigital number, since it uses as much as digits as its factorization.

135421024345121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30019230.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 135421024345121 its reverse (121543420124531), we get a palindrome (256964444469652).

The spelling of 135421024345121 in words is "one hundred thirty-five trillion, four hundred twenty-one billion, twenty-four million, three hundred forty-five thousand, one hundred twenty-one".