134220221 has 8 divisors (see below), whose sum is σ = 139073760. Its totient is φ = 129452752.

The previous prime is 134220217. The next prime is 134220239. The reversal of 134220221 is 122022431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 134220221 - 2² = 134220217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134220211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18335 + ... + 24588.

It is an arithmetic number, because the mean of its divisors is an integer number (17384220).

Almost surely, 2^134220221 is an apocalyptic number.

It is an amenable number.

134220221 is a deficient number, since it is larger than the sum of its proper divisors (4853539).

134220221 is an equidigital number, since it uses as much as digits as its factorization.

134220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43035.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 134220221 is about 11585.3450962844. The cubic root of 134220221 is about 512.0031699938.

Adding to 134220221 its reverse (122022431), we get a palindrome (256242652).

The spelling of 134220221 in words is "one hundred thirty-four million, two hundred twenty thousand, two hundred twenty-one".