42420203021 has 12 divisors (see below), whose sum is σ = 49360832640. Its totient is φ = 36349208280.

The previous prime is 42420203011. The next prime is 42420203027. The reversal of 42420203021 is 12030202424.

It is not a de Polignac number, because 42420203021 - 2¹⁰ = 42420201997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42420202984 and 42420203002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420203027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35726 + ... + 293456.

It is an arithmetic number, because the mean of its divisors is an integer number (4113402720).

Almost surely, 2^42420203021 is an apocalyptic number.

It is an amenable number.

42420203021 is a deficient number, since it is larger than the sum of its proper divisors (6940629619).

42420203021 is a wasteful number, since it uses less digits than its factorization.

42420203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261104 (or 261097 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 42420203021 its reverse (12030202424), we get a palindrome (54450405445).

The spelling of 42420203021 in words is "forty-two billion, four hundred twenty million, two hundred three thousand, twenty-one".