42004442020221 has 16 divisors (see below), whose sum is σ = 62266088142400. Its totient is φ = 27986183029584.

The previous prime is 42004442020199. The next prime is 42004442020231. The reversal of 42004442020221 is 12202024440024.

It is not a de Polignac number, because 42004442020221 - 2¹¹ = 42004442018173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004442020231) 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, 466018471 + ... + 466108596.

It is an arithmetic number, because the mean of its divisors is an integer number (3891630508900).

Almost surely, 2^{42004442020221} is an apocalyptic number.

It is an amenable number.

42004442020221 is a deficient number, since it is larger than the sum of its proper divisors (20261646122179).

42004442020221 is a wasteful number, since it uses less digits than its factorization.

42004442020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932128745 (or 932128739 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 42004442020221 its reverse (12202024440024), we get a palindrome (54206466460245).

The spelling of 42004442020221 in words is "forty-two trillion, four billion, four hundred forty-two million, twenty thousand, two hundred twenty-one".