16221477029 has 2 divisors, whose sum is σ = 16221477030. Its totient is φ = 16221477028.

The previous prime is 16221477011. The next prime is 16221477037. The reversal of 16221477029 is 92077412261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8300121025 + 7921356004 = 91105^2 + 89002^2 .

It is a cyclic number.

It is not a de Polignac number, because 16221477029 - 2⁸ = 16221476773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16221477059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110738514 + 8110738515.

It is an arithmetic number, because the mean of its divisors is an integer number (8110738515).

Almost surely, 2^16221477029 is an apocalyptic number.

It is an amenable number.

16221477029 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221477029 is an equidigital number, since it uses as much as digits as its factorization.

16221477029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 16221477029 in words is "sixteen billion, two hundred twenty-one million, four hundred seventy-seven thousand, twenty-nine".