4133541221 has 2 divisors, whose sum is σ = 4133541222. Its totient is φ = 4133541220.

The previous prime is 4133541131. The next prime is 4133541229. The reversal of 4133541221 is 1221453314.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3571377121 + 562164100 = 59761^2 + 23710^2 .

It is a cyclic number.

It is not a de Polignac number, because 4133541221 - 2¹⁸ = 4133279077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4133541229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2066770610 + 2066770611.

It is an arithmetic number, because the mean of its divisors is an integer number (2066770611).

Almost surely, 2^4133541221 is an apocalyptic number.

It is an amenable number.

4133541221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4133541221 is an equidigital number, since it uses as much as digits as its factorization.

4133541221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 4133541221 is about 64292.6218239698. The cubic root of 4133541221 is about 1604.8733214589.

Adding to 4133541221 its reverse (1221453314), we get a palindrome (5354994535).

The spelling of 4133541221 in words is "four billion, one hundred thirty-three million, five hundred forty-one thousand, two hundred twenty-one".