135501257121 has 4 divisors (see below), whose sum is σ = 180668342832. Its totient is φ = 90334171412.

The previous prime is 135501257119. The next prime is 135501257131. The reversal of 135501257121 is 121752105531.

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 not a de Polignac number, because 135501257121 - 2¹ = 135501257119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135501257131) 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, 22583542851 + ... + 22583542856.

It is an arithmetic number, because the mean of its divisors is an integer number (45167085708).

Almost surely, 2^135501257121 is an apocalyptic number.

It is an amenable number.

135501257121 is a deficient number, since it is larger than the sum of its proper divisors (45167085711).

135501257121 is an equidigital number, since it uses as much as digits as its factorization.

135501257121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45167085710.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 135501257121 in words is "one hundred thirty-five billion, five hundred one million, two hundred fifty-seven thousand, one hundred twenty-one".