421104440421 has 12 divisors (see below), whose sum is σ = 695156536672. Its totient is φ = 240631108776.

The previous prime is 421104440387. The next prime is 421104440437. The reversal of 421104440421 is 124044401124.

It is a happy number.

421104440421 is a `hidden beast` number, since 4 + 211 + 0 + 4 + 440 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 421104440421 - 2⁶ = 421104440357 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 (421104440461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3342098671 + ... + 3342098796.

Almost surely, 2^421104440421 is an apocalyptic number.

It is an amenable number.

421104440421 is a deficient number, since it is larger than the sum of its proper divisors (274052096251).

421104440421 is a wasteful number, since it uses less digits than its factorization.

421104440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684197480 (or 6684197477 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 421104440421 its reverse (124044401124), we get a palindrome (545148841545).

The spelling of 421104440421 in words is "four hundred twenty-one billion, one hundred four million, four hundred forty thousand, four hundred twenty-one".