4021433430421 has 4 divisors (see below), whose sum is σ = 4387018287744. Its totient is φ = 3655848573100.

The previous prime is 4021433430419. The next prime is 4021433430449. The reversal of 4021433430421 is 1240343341204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021433430421 - 2¹ = 4021433430419 is a prime.

It is a super-2 number, since 2×4021433430421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021433430451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182792428645 + ... + 182792428666.

It is an arithmetic number, because the mean of its divisors is an integer number (1096754571936).

Almost surely, 2^{4021433430421} is an apocalyptic number.

It is an amenable number.

4021433430421 is a deficient number, since it is larger than the sum of its proper divisors (365584857323).

4021433430421 is a wasteful number, since it uses less digits than its factorization.

4021433430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365584857322.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 4021433430421 its reverse (1240343341204), we get a palindrome (5261776771625).

The spelling of 4021433430421 in words is "four trillion, twenty-one billion, four hundred thirty-three million, four hundred thirty thousand, four hundred twenty-one".