16336118221 has 2 divisors, whose sum is σ = 16336118222. Its totient is φ = 16336118220.

The previous prime is 16336118213. The next prime is 16336118297. The reversal of 16336118221 is 12281163361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9361530025 + 6974588196 = 96755^2 + 83514^2 .

It is a cyclic number.

It is not a de Polignac number, because 16336118221 - 2³ = 16336118213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16336118921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8168059110 + 8168059111.

It is an arithmetic number, because the mean of its divisors is an integer number (8168059111).

Almost surely, 2^16336118221 is an apocalyptic number.

It is an amenable number.

16336118221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16336118221 is an equidigital number, since it uses as much as digits as its factorization.

16336118221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The spelling of 16336118221 in words is "sixteen billion, three hundred thirty-six million, one hundred eighteen thousand, two hundred twenty-one".