136242121 has 4 divisors (see below), whose sum is σ = 136265472. Its totient is φ = 136218772.

The previous prime is 136242109. The next prime is 136242157. The reversal of 136242121 is 121242631.

136242121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 136242121 - 2⁵ = 136242089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136242092 and 136242101.

It is not an unprimeable number, because it can be changed into a prime (136242191) 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, 5460 + ... + 17386.

It is an arithmetic number, because the mean of its divisors is an integer number (34066368).

Almost surely, 2^136242121 is an apocalyptic number.

It is an amenable number.

136242121 is a deficient number, since it is larger than the sum of its proper divisors (23351).

136242121 is a wasteful number, since it uses less digits than its factorization.

136242121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23350.

The product of its digits is 576, while the sum is 22.

The square root of 136242121 is about 11672.2800257705. The cubic root of 136242121 is about 514.5613143013.

Adding to 136242121 its reverse (121242631), we get a palindrome (257484752).

The spelling of 136242121 in words is "one hundred thirty-six million, two hundred forty-two thousand, one hundred twenty-one".