401221333 has 2 divisors, whose sum is σ = 401221334. Its totient is φ = 401221332.

The previous prime is 401221307. The next prime is 401221343. The reversal of 401221333 is 333122104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348120964 + 53100369 = 18658^2 + 7287^2 .

It is a cyclic number.

It is not a de Polignac number, because 401221333 - 2⁹ = 401220821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401221333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401221343) 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, 200610666 + 200610667.

It is an arithmetic number, because the mean of its divisors is an integer number (200610667).

Almost surely, 2^401221333 is an apocalyptic number.

It is an amenable number.

401221333 is a deficient number, since it is larger than the sum of its proper divisors (1).

401221333 is an equidigital number, since it uses as much as digits as its factorization.

401221333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 401221333 is about 20030.5100534160. The cubic root of 401221333 is about 737.5554426575. Note that the first 3 decimals are identical.

Adding to 401221333 its reverse (333122104), we get a palindrome (734343437).

The spelling of 401221333 in words is "four hundred one million, two hundred twenty-one thousand, three hundred thirty-three".