4021004023421 has 32 divisors (see below), whose sum is σ = 5065318748160. Its totient is φ = 3100745188800.

The previous prime is 4021004023411. The next prime is 4021004023423. The reversal of 4021004023421 is 1243204001204.

4021004023421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4021004023421 - 2¹⁴ = 4021004007037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021004023423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6651356 + ... + 7230666.

It is an arithmetic number, because the mean of its divisors is an integer number (158291210880).

Almost surely, 2^{4021004023421} is an apocalyptic number.

It is an amenable number.

4021004023421 is a deficient number, since it is larger than the sum of its proper divisors (1044314724739).

4021004023421 is a wasteful number, since it uses less digits than its factorization.

4021004023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580265.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4021004023421 its reverse (1243204001204), we get a palindrome (5264208024625).

The spelling of 4021004023421 in words is "four trillion, twenty-one billion, four million, twenty-three thousand, four hundred twenty-one".