135315113221 has 2 divisors, whose sum is σ = 135315113222. Its totient is φ = 135315113220.

The previous prime is 135315113209. The next prime is 135315113233. The reversal of 135315113221 is 122311513531.

It is a balanced prime because it is at equal distance from previous prime (135315113209) and next prime (135315113233).

It can be written as a sum of positive squares in only one way, i.e., 79812465121 + 55502648100 = 282511^2 + 235590^2 .

It is a cyclic number.

It is not a de Polignac number, because 135315113221 - 2⁷ = 135315113093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135315113221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135315113201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67657556610 + 67657556611.

It is an arithmetic number, because the mean of its divisors is an integer number (67657556611).

Almost surely, 2^135315113221 is an apocalyptic number.

It is an amenable number.

135315113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

135315113221 is an equidigital number, since it uses as much as digits as its factorization.

135315113221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 28.

Adding to 135315113221 its reverse (122311513531), we get a palindrome (257626626752).

The spelling of 135315113221 in words is "one hundred thirty-five billion, three hundred fifteen million, one hundred thirteen thousand, two hundred twenty-one".