134881221 has 4 divisors (see below), whose sum is σ = 179841632. Its totient is φ = 89920812.

The previous prime is 134881199. The next prime is 134881231. The reversal of 134881221 is 122188431.

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 not a de Polignac number, because 134881221 - 2⁵ = 134881189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134881231) 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, 22480201 + ... + 22480206.

It is an arithmetic number, because the mean of its divisors is an integer number (44960408).

Almost surely, 2^134881221 is an apocalyptic number.

It is an amenable number.

134881221 is a deficient number, since it is larger than the sum of its proper divisors (44960411).

134881221 is an equidigital number, since it uses as much as digits as its factorization.

134881221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44960410.

The product of its digits is 3072, while the sum is 30.

The square root of 134881221 is about 11613.8374794897. The cubic root of 134881221 is about 512.8422885732.

The spelling of 134881221 in words is "one hundred thirty-four million, eight hundred eighty-one thousand, two hundred twenty-one".