16900560221 has 2 divisors, whose sum is σ = 16900560222. Its totient is φ = 16900560220.

The previous prime is 16900560119. The next prime is 16900560247. The reversal of 16900560221 is 12206500961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15179472025 + 1721088196 = 123205^2 + 41486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16900560221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16000560221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8450280110 + 8450280111.

It is an arithmetic number, because the mean of its divisors is an integer number (8450280111).

Almost surely, 2^16900560221 is an apocalyptic number.

It is an amenable number.

16900560221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16900560221 is an equidigital number, since it uses as much as digits as its factorization.

16900560221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 16900560221 in words is "sixteen billion, nine hundred million, five hundred sixty thousand, two hundred twenty-one".