135341221 has 4 divisors (see below), whose sum is σ = 137635200. Its totient is φ = 133047244.

The previous prime is 135341203. The next prime is 135341243. The reversal of 135341221 is 122143531.

It is a happy number.

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 135341221 - 2⁵ = 135341189 is a prime.

It is a super-2 number, since 2×135341221² = 36634492203541682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135341192 and 135341201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135441221) 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, 1146901 + ... + 1147018.

It is an arithmetic number, because the mean of its divisors is an integer number (34408800).

Almost surely, 2^135341221 is an apocalyptic number.

It is an amenable number.

135341221 is a deficient number, since it is larger than the sum of its proper divisors (2293979).

135341221 is an equidigital number, since it uses as much as digits as its factorization.

135341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293978.

The product of its digits is 720, while the sum is 22.

The square root of 135341221 is about 11633.6245856569. The cubic root of 135341221 is about 513.4246275569.

Adding to 135341221 its reverse (122143531), we get a palindrome (257484752).

The spelling of 135341221 in words is "one hundred thirty-five million, three hundred forty-one thousand, two hundred twenty-one".