42331344221 has 4 divisors (see below), whose sum is σ = 44171837472. Its totient is φ = 40490850972.

The previous prime is 42331344199. The next prime is 42331344239. The reversal of 42331344221 is 12244313324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42331344221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42331344271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920246591 + ... + 920246636.

It is an arithmetic number, because the mean of its divisors is an integer number (11042959368).

Almost surely, 2^42331344221 is an apocalyptic number.

It is an amenable number.

42331344221 is a deficient number, since it is larger than the sum of its proper divisors (1840493251).

42331344221 is a wasteful number, since it uses less digits than its factorization.

42331344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840493250.

The product of its digits is 13824, while the sum is 29.

Adding to 42331344221 its reverse (12244313324), we get a palindrome (54575657545).

The spelling of 42331344221 in words is "forty-two billion, three hundred thirty-one million, three hundred forty-four thousand, two hundred twenty-one".