135214121 has 4 divisors (see below), whose sum is σ = 154530432. Its totient is φ = 115897812.

The previous prime is 135214097. The next prime is 135214129. The reversal of 135214121 is 121412531.

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 an emirpimes, since its reverse is a distinct semiprime: 121412531 = 29 ⋅4186639.

It is a cyclic number.

It is not a de Polignac number, because 135214121 - 2¹⁴ = 135197737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135214093 and 135214102.

It is not an unprimeable number, because it can be changed into a prime (135214129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9658145 + ... + 9658158.

It is an arithmetic number, because the mean of its divisors is an integer number (38632608).

Almost surely, 2^135214121 is an apocalyptic number.

It is an amenable number.

135214121 is a deficient number, since it is larger than the sum of its proper divisors (19316311).

135214121 is an equidigital number, since it uses as much as digits as its factorization.

135214121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19316310.

The product of its digits is 240, while the sum is 20.

The square root of 135214121 is about 11628.1606886042. The cubic root of 135214121 is about 513.2638568572.

Adding to 135214121 its reverse (121412531), we get a palindrome (256626652).

The spelling of 135214121 in words is "one hundred thirty-five million, two hundred fourteen thousand, one hundred twenty-one".