42321102021 has 20 divisors (see below), whose sum is σ = 68967723264. Its totient is φ = 25649152200.

The previous prime is 42321102011. The next prime is 42321102077. The reversal of 42321102021 is 12020112324.

It is a happy number.

It is not a de Polignac number, because 42321102021 - 2¹⁴ = 42321085637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42321101985 and 42321102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42321102001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23748325 + ... + 23750106.

Almost surely, 2^42321102021 is an apocalyptic number.

It is an amenable number.

42321102021 is a deficient number, since it is larger than the sum of its proper divisors (26646621243).

42321102021 is a wasteful number, since it uses less digits than its factorization.

42321102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47498454 (or 47498445 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42321102021 its reverse (12020112324), we get a palindrome (54341214345).

The spelling of 42321102021 in words is "forty-two billion, three hundred twenty-one million, one hundred two thousand, twenty-one".