135151221137 has 2 divisors, whose sum is σ = 135151221138. Its totient is φ = 135151221136.

The previous prime is 135151221119. The next prime is 135151221151. The reversal of 135151221137 is 731122151531.

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., 120769455361 + 14381765776 = 347519^2 + 119924^2 .

It is a cyclic number.

It is not a de Polignac number, because 135151221137 - 2¹⁴ = 135151204753 is a prime.

It is not a weakly prime, because it can be changed into another prime (135151221187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67575610568 + 67575610569.

It is an arithmetic number, because the mean of its divisors is an integer number (67575610569).

Almost surely, 2^135151221137 is an apocalyptic number.

It is an amenable number.

135151221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

135151221137 is an equidigital number, since it uses as much as digits as its factorization.

135151221137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

Adding to 135151221137 its reverse (731122151531), we get a palindrome (866273372668).

The spelling of 135151221137 in words is "one hundred thirty-five billion, one hundred fifty-one million, two hundred twenty-one thousand, one hundred thirty-seven".