135435522315221 has 16 divisors (see below), whose sum is σ = 145660116976128. Its totient is φ = 125597188886400.

The previous prime is 135435522315217. The next prime is 135435522315239. The reversal of 135435522315221 is 122513225534531.

It is a cyclic number.

It is not a de Polignac number, because 135435522315221 - 2² = 135435522315217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135435522315421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282943565 + ... + 283421826.

It is an arithmetic number, because the mean of its divisors is an integer number (9103757311008).

Almost surely, 2^{135435522315221} is an apocalyptic number.

It is an amenable number.

135435522315221 is a deficient number, since it is larger than the sum of its proper divisors (10224594660907).

135435522315221 is a wasteful number, since it uses less digits than its factorization.

135435522315221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566365732.

The product of its digits is 1080000, while the sum is 44.

Adding to 135435522315221 its reverse (122513225534531), we get a palindrome (257948747849752).

The spelling of 135435522315221 in words is "one hundred thirty-five trillion, four hundred thirty-five billion, five hundred twenty-two million, three hundred fifteen thousand, two hundred twenty-one".