135151821137 has 2 divisors, whose sum is σ = 135151821138. Its totient is φ = 135151821136.

The previous prime is 135151821011. The next prime is 135151821169. The reversal of 135151821137 is 731128151531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135141523456 + 10297681 = 367616^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 135151821137 - 2²² = 135147626833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135151821137.

It is not a weakly prime, because it can be changed into another prime (135151221137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67575910568 + 67575910569.

It is an arithmetic number, because the mean of its divisors is an integer number (67575910569).

Almost surely, 2^135151821137 is an apocalyptic number.

It is an amenable number.

135151821137 is a deficient number, since it is larger than the sum of its proper divisors (1).

135151821137 is an equidigital number, since it uses as much as digits as its factorization.

135151821137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 38.

Adding to 135151821137 its reverse (731128151531), we get a palindrome (866279972668).

The spelling of 135151821137 in words is "one hundred thirty-five billion, one hundred fifty-one million, eight hundred twenty-one thousand, one hundred thirty-seven".