134013221 has 4 divisors (see below), whose sum is σ = 134835552. Its totient is φ = 133190892.

The previous prime is 134013127. The next prime is 134013233. The reversal of 134013221 is 122310431.

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: 122310431 = 743 ⋅164617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134013221 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 134013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134010221) 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, 410921 + ... + 411246.

It is an arithmetic number, because the mean of its divisors is an integer number (33708888).

Almost surely, 2^134013221 is an apocalyptic number.

It is an amenable number.

134013221 is a deficient number, since it is larger than the sum of its proper divisors (822331).

134013221 is an equidigital number, since it uses as much as digits as its factorization.

134013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822330.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 134013221 is about 11576.4079489279. The cubic root of 134013221 is about 511.7398237141.

Adding to 134013221 its reverse (122310431), we get a palindrome (256323652).

The spelling of 134013221 in words is "one hundred thirty-four million, thirteen thousand, two hundred twenty-one".