421041124403221 has 12 divisors (see below), whose sum is σ = 491688301092588. Its totient is φ = 359488141780992.

The previous prime is 421041124403219. The next prime is 421041124403231. The reversal of 421041124403221 is 122304421140124.

It can be written as a sum of positive squares in 2 ways, for example, as 240064345880100 + 180976778523121 = 15494010^2 + 13452761^2 .

It is not a de Polignac number, because 421041124403221 - 2¹ = 421041124403219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421041124403201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16717255906 + ... + 16717281091.

It is an arithmetic number, because the mean of its divisors is an integer number (40974025091049).

Almost surely, 2^{421041124403221} is an apocalyptic number.

It is an amenable number.

421041124403221 is a deficient number, since it is larger than the sum of its proper divisors (70647176689367).

421041124403221 is a wasteful number, since it uses less digits than its factorization.

421041124403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33434537268 (or 33434537261 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 421041124403221 its reverse (122304421140124), we get a palindrome (543345545543345).

The spelling of 421041124403221 in words is "four hundred twenty-one trillion, forty-one billion, one hundred twenty-four million, four hundred three thousand, two hundred twenty-one".