4021432400421 has 6 divisors (see below), whose sum is σ = 5808735689510. Its totient is φ = 2680954933608.

The previous prime is 4021432400407. The next prime is 4021432400449. The reversal of 4021432400421 is 1240042341204.

4021432400421 is a `hidden beast` number, since 4 + 0 + 214 + 3 + 2 + 400 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3182905764900 + 838526635521 = 1784070^2 + 915711^2 .

It is not a de Polignac number, because 4021432400421 - 2⁶ = 4021432400357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021432400021) 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 in 5 ways as a sum of consecutive naturals, for example, 223412911126 + ... + 223412911143.

Almost surely, 2^{4021432400421} is an apocalyptic number.

It is an amenable number.

4021432400421 is a deficient number, since it is larger than the sum of its proper divisors (1787303289089).

4021432400421 is a wasteful number, since it uses less digits than its factorization.

4021432400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446825822275 (or 446825822272 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 4021432400421 its reverse (1240042341204), we get a palindrome (5261474741625).

The spelling of 4021432400421 in words is "four trillion, twenty-one billion, four hundred thirty-two million, four hundred thousand, four hundred twenty-one".