4440021023421 has 12 divisors (see below), whose sum is σ = 6421903475520. Its totient is φ = 2956072581000.

The previous prime is 4440021023387. The next prime is 4440021023441. The reversal of 4440021023421 is 1243201200444.

4440021023421 is a `hidden beast` number, since 4 + 4 + 4 + 0 + 0 + 210 + 23 + 421 = 666.

It is not a de Polignac number, because 4440021023421 - 2⁶ = 4440021023357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440021023441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328445751 + ... + 328459268.

It is an arithmetic number, because the mean of its divisors is an integer number (535158622960).

Almost surely, 2^{4440021023421} is an apocalyptic number.

It is an amenable number.

4440021023421 is a deficient number, since it is larger than the sum of its proper divisors (1981882452099).

4440021023421 is a wasteful number, since it uses less digits than its factorization.

4440021023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656905776 (or 656905773 counting only the distinct ones).

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

Adding to 4440021023421 its reverse (1243201200444), we get a palindrome (5683222223865).

The spelling of 4440021023421 in words is "four trillion, four hundred forty billion, twenty-one million, twenty-three thousand, four hundred twenty-one".