42243331222021 has 4 divisors (see below), whose sum is σ = 42243345174592. Its totient is φ = 42243317269452.

The previous prime is 42243331221991. The next prime is 42243331222063. The reversal of 42243331222021 is 12022213334224.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42243331222021 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 (42243331222621) 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, 314061 + ... + 9197026.

It is an arithmetic number, because the mean of its divisors is an integer number (10560836293648).

Almost surely, 2^{42243331222021} is an apocalyptic number.

It is an amenable number.

42243331222021 is a deficient number, since it is larger than the sum of its proper divisors (13952571).

42243331222021 is an equidigital number, since it uses as much as digits as its factorization.

42243331222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13952570.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 42243331222021 its reverse (12022213334224), we get a palindrome (54265544556245).

The spelling of 42243331222021 in words is "forty-two trillion, two hundred forty-three billion, three hundred thirty-one million, two hundred twenty-two thousand, twenty-one".