4021423132321 has 16 divisors (see below), whose sum is σ = 4683091811328. Its totient is φ = 3381562267200.

The previous prime is 4021423132297. The next prime is 4021423132361. The reversal of 4021423132321 is 1232313241204.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021423132321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4021423132321.

It is not an unprimeable number, because it can be changed into a prime (4021423132361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3244816 + ... + 4309486.

It is an arithmetic number, because the mean of its divisors is an integer number (292693238208).

Almost surely, 2^{4021423132321} is an apocalyptic number.

It is an amenable number.

4021423132321 is a deficient number, since it is larger than the sum of its proper divisors (661668679007).

4021423132321 is a wasteful number, since it uses less digits than its factorization.

4021423132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074912.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 4021423132321 its reverse (1232313241204), we get a palindrome (5253736373525).

The spelling of 4021423132321 in words is "four trillion, twenty-one billion, four hundred twenty-three million, one hundred thirty-two thousand, three hundred twenty-one".