16000430221 has 2 divisors, whose sum is σ = 16000430222. Its totient is φ = 16000430220.

The previous prime is 16000430203. The next prime is 16000430293. The reversal of 16000430221 is 12203400061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15690318121 + 310112100 = 125261^2 + 17610^2 .

It is an emirp because it is prime and its reverse (12203400061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16000430221 - 2²³ = 15992041613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16000437221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000215110 + 8000215111.

It is an arithmetic number, because the mean of its divisors is an integer number (8000215111).

Almost surely, 2^16000430221 is an apocalyptic number.

It is an amenable number.

16000430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000430221 is an equidigital number, since it uses as much as digits as its factorization.

16000430221 is an evil number, because the sum of its binary digits is even.

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

Adding to 16000430221 its reverse (12203400061), we get a palindrome (28203830282).

The spelling of 16000430221 in words is "sixteen billion, four hundred thirty thousand, two hundred twenty-one".