121983109 has 16 divisors (see below), whose sum is σ = 134078976. Its totient is φ = 110476800.

The previous prime is 121983107. The next prime is 121983137. The reversal of 121983109 is 901389121.

It is a cyclic number.

It is not a de Polignac number, because 121983109 - 2¹ = 121983107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121983107) 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 in 15 ways as a sum of consecutive naturals, for example, 110649 + ... + 111745.

It is an arithmetic number, because the mean of its divisors is an integer number (8379936).

Almost surely, 2^121983109 is an apocalyptic number.

It is an amenable number.

121983109 is a deficient number, since it is larger than the sum of its proper divisors (12095867).

121983109 is a wasteful number, since it uses less digits than its factorization.

121983109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 121983109 is about 11044.5963710767. The cubic root of 121983109 is about 495.9446762891.

The spelling of 121983109 in words is "one hundred twenty-one million, nine hundred eighty-three thousand, one hundred nine".