42021430221321 has 6 divisors (see below), whose sum is σ = 60697621430810. Its totient is φ = 28014286814208.

The previous prime is 42021430221229. The next prime is 42021430221347. The reversal of 42021430221321 is 12312203412024.

42021430221321 is a `hidden beast` number, since 4 + 2 + 0 + 2 + 1 + 430 + 221 + 3 + 2 + 1 = 666.

42021430221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40379416070400 + 1642014150921 = 6354480^2 + 1281411^2 .

It is not a de Polignac number, because 42021430221321 - 2²⁶ = 42021363112457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021430221521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2334523901176 + ... + 2334523901193.

Almost surely, 2^{42021430221321} is an apocalyptic number.

It is an amenable number.

42021430221321 is a deficient number, since it is larger than the sum of its proper divisors (18676191209489).

42021430221321 is a wasteful number, since it uses less digits than its factorization.

42021430221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669047802375 (or 4669047802372 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 42021430221321 its reverse (12312203412024), we get a palindrome (54333633633345).

The spelling of 42021430221321 in words is "forty-two trillion, twenty-one billion, four hundred thirty million, two hundred twenty-one thousand, three hundred twenty-one".