42031103221 has 4 divisors (see below), whose sum is σ = 42045339532. Its totient is φ = 42016866912.

The previous prime is 42031103207. The next prime is 42031103239. The reversal of 42031103221 is 12230113024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12442287025 + 29588816196 = 111545^2 + 172014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42031103221 is a prime.

It is a super-2 number, since 2×42031103221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031103321) 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 3 ways as a sum of consecutive naturals, for example, 7113726 + ... + 7119631.

It is an arithmetic number, because the mean of its divisors is an integer number (10511334883).

Almost surely, 2^42031103221 is an apocalyptic number.

It is an amenable number.

42031103221 is a deficient number, since it is larger than the sum of its proper divisors (14236311).

42031103221 is a wasteful number, since it uses less digits than its factorization.

42031103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14236310.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 42031103221 its reverse (12230113024), we get a palindrome (54261216245).

The spelling of 42031103221 in words is "forty-two billion, thirty-one million, one hundred three thousand, two hundred twenty-one".