401003042221 has 2 divisors, whose sum is σ = 401003042222. Its totient is φ = 401003042220.

The previous prime is 401003042197. The next prime is 401003042227. The reversal of 401003042221 is 122240300104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225558504900 + 175444537321 = 474930^2 + 418861^2 .

It is a cyclic number.

It is not a de Polignac number, because 401003042221 - 2¹⁵ = 401003009453 is a prime.

It is a super-2 number, since 2×401003042221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401003042227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200501521110 + 200501521111.

It is an arithmetic number, because the mean of its divisors is an integer number (200501521111).

Almost surely, 2^401003042221 is an apocalyptic number.

It is an amenable number.

401003042221 is a deficient number, since it is larger than the sum of its proper divisors (1).

401003042221 is an equidigital number, since it uses as much as digits as its factorization.

401003042221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 401003042221 its reverse (122240300104), we get a palindrome (523243342325).

The spelling of 401003042221 in words is "four hundred one billion, three million, forty-two thousand, two hundred twenty-one".