134331221 has 2 divisors, whose sum is σ = 134331222. Its totient is φ = 134331220.

The previous prime is 134331209. The next prime is 134331283. The reversal of 134331221 is 122133431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 15760900 = 10889^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 134331221 - 2⁶ = 134331157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 134331193 and 134331202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134330221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67165610 + 67165611.

It is an arithmetic number, because the mean of its divisors is an integer number (67165611).

Almost surely, 2^134331221 is an apocalyptic number.

It is an amenable number.

134331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

134331221 is an equidigital number, since it uses as much as digits as its factorization.

134331221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 134331221 is about 11590.1346411506. The cubic root of 134331221 is about 512.1442731546.

Adding to 134331221 its reverse (122133431), we get a palindrome (256464652).

The spelling of 134331221 in words is "one hundred thirty-four million, three hundred thirty-one thousand, two hundred twenty-one".