42021331001 has 6 divisors (see below), whose sum is σ = 45502388190. Its totient is φ = 38788920768.

The previous prime is 42021330979. The next prime is 42021331007. The reversal of 42021331001 is 10013312024.

It can be written as a sum of positive squares in 3 ways, for example, as 1499238400 + 40522092601 = 38720^2 + 201301^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42021331001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021331007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124323296 + ... + 124323633.

It is an arithmetic number, because the mean of its divisors is an integer number (7583731365).

Almost surely, 2^42021331001 is an apocalyptic number.

It is an amenable number.

42021331001 is a deficient number, since it is larger than the sum of its proper divisors (3481057189).

42021331001 is a wasteful number, since it uses less digits than its factorization.

42021331001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248646955 (or 248646942 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 42021331001 its reverse (10013312024), we get a palindrome (52034643025).

The spelling of 42021331001 in words is "forty-two billion, twenty-one million, three hundred thirty-one thousand, one".