42043131321 has 16 divisors (see below), whose sum is σ = 58941197760. Its totient is φ = 26618598720.

The previous prime is 42043131293. The next prime is 42043131349. The reversal of 42043131321 is 12313134024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42043131293) and next prime (42043131349).

It is not a de Polignac number, because 42043131321 - 2⁶ = 42043131257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42043131291 and 42043131300.

It is not an unprimeable number, because it can be changed into a prime (42043131121) 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, 3955795 + ... + 3966408.

It is an arithmetic number, because the mean of its divisors is an integer number (3683824860).

Almost surely, 2^42043131321 is an apocalyptic number.

It is an amenable number.

42043131321 is a deficient number, since it is larger than the sum of its proper divisors (16898066439).

42043131321 is a wasteful number, since it uses less digits than its factorization.

42043131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922296.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 42043131321 its reverse (12313134024), we get a palindrome (54356265345).

The spelling of 42043131321 in words is "forty-two billion, forty-three million, one hundred thirty-one thousand, three hundred twenty-one".