42220432321 has 4 divisors (see below), whose sum is σ = 42230126932. Its totient is φ = 42210737712.

The previous prime is 42220432283. The next prime is 42220432349. The reversal of 42220432321 is 12323402224.

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 30681375921 + 11539056400 = 175161^2 + 107420^2 .

It is a cyclic number.

It is not a de Polignac number, because 42220432321 - 2¹⁹ = 42219908033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42220432921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4840770 + ... + 4849483.

It is an arithmetic number, because the mean of its divisors is an integer number (10557531733).

Almost surely, 2^42220432321 is an apocalyptic number.

It is an amenable number.

42220432321 is a deficient number, since it is larger than the sum of its proper divisors (9694611).

42220432321 is an equidigital number, since it uses as much as digits as its factorization.

42220432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694610.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 42220432321 its reverse (12323402224), we get a palindrome (54543834545).

The spelling of 42220432321 in words is "forty-two billion, two hundred twenty million, four hundred thirty-two thousand, three hundred twenty-one".