133140221 has 2 divisors, whose sum is σ = 133140222. Its totient is φ = 133140220.

The previous prime is 133140199. The next prime is 133140233. The reversal of 133140221 is 122041331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 37687321 = 9770^2 + 6139^2 .

It is an emirp because it is prime and its reverse (122041331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133140221 - 2⁶ = 133140157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133140221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133142221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66570110 + 66570111.

It is an arithmetic number, because the mean of its divisors is an integer number (66570111).

Almost surely, 2^133140221 is an apocalyptic number.

It is an amenable number.

133140221 is a deficient number, since it is larger than the sum of its proper divisors (1).

133140221 is an equidigital number, since it uses as much as digits as its factorization.

133140221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 133140221 is about 11538.6403445120. The cubic root of 133140221 is about 510.6261960893.

Adding to 133140221 its reverse (122041331), we get a palindrome (255181552).

The spelling of 133140221 in words is "one hundred thirty-three million, one hundred forty thousand, two hundred twenty-one".