109921601 has 2 divisors, whose sum is σ = 109921602. Its totient is φ = 109921600.

The previous prime is 109921589. The next prime is 109921667. The reversal of 109921601 is 106129901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60078001 + 49843600 = 7751^2 + 7060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109921601 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (109921681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54960800 + 54960801.

It is an arithmetic number, because the mean of its divisors is an integer number (54960801).

Almost surely, 2^109921601 is an apocalyptic number.

It is an amenable number.

109921601 is a deficient number, since it is larger than the sum of its proper divisors (1).

109921601 is an equidigital number, since it uses as much as digits as its factorization.

109921601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 109921601 is about 10484.3502898368. The cubic root of 109921601 is about 479.0281275841.

The spelling of 109921601 in words is "one hundred nine million, nine hundred twenty-one thousand, six hundred one".