109981121 has 2 divisors, whose sum is σ = 109981122. Its totient is φ = 109981120.

The previous prime is 109981093. The next prime is 109981141. The reversal of 109981121 is 121189901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56851600 + 53129521 = 7540^2 + 7289^2 .

It is a cyclic number.

It is not a de Polignac number, because 109981121 - 2¹⁰ = 109980097 is a prime.

It is not a weakly prime, because it can be changed into another prime (109981141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54990560 + 54990561.

It is an arithmetic number, because the mean of its divisors is an integer number (54990561).

Almost surely, 2^109981121 is an apocalyptic number.

It is an amenable number.

109981121 is a deficient number, since it is larger than the sum of its proper divisors (1).

109981121 is an equidigital number, since it uses as much as digits as its factorization.

109981121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 109981121 is about 10487.1884220700. The cubic root of 109981121 is about 479.1145728605.

The spelling of 109981121 in words is "one hundred nine million, nine hundred eighty-one thousand, one hundred twenty-one".