42143203321 has 2 divisors, whose sum is σ = 42143203322. Its totient is φ = 42143203320.

The previous prime is 42143203283. The next prime is 42143203343. The reversal of 42143203321 is 12330234124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29977113321 + 12166090000 = 173139^2 + 110300^2 .

It is a cyclic number.

It is not a de Polignac number, because 42143203321 - 2¹⁷ = 42143072249 is a prime.

It is not a weakly prime, because it can be changed into another prime (42143203381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071601660 + 21071601661.

It is an arithmetic number, because the mean of its divisors is an integer number (21071601661).

Almost surely, 2^42143203321 is an apocalyptic number.

It is an amenable number.

42143203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42143203321 is an equidigital number, since it uses as much as digits as its factorization.

42143203321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42143203321 its reverse (12330234124), we get a palindrome (54473437445).

The spelling of 42143203321 in words is "forty-two billion, one hundred forty-three million, two hundred three thousand, three hundred twenty-one".