121639119 has 16 divisors (see below), whose sum is σ = 189139200. Its totient is φ = 69507480.

The previous prime is 121639099. The next prime is 121639123. The reversal of 121639119 is 911936121.

It is not a de Polignac number, because 121639119 - 2⁹ = 121638607 is a prime.

It is a super-2 number, since 2×121639119² = 29592150542192322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121639119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121639129) 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, 58077 + ... + 60134.

It is an arithmetic number, because the mean of its divisors is an integer number (11821200).

Almost surely, 2^121639119 is an apocalyptic number.

121639119 is a deficient number, since it is larger than the sum of its proper divisors (67500081).

121639119 is an equidigital number, since it uses as much as digits as its factorization.

121639119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118235 (or 118221 counting only the distinct ones).

The product of its digits is 2916, while the sum is 33.

The square root of 121639119 is about 11029.0126031300. The cubic root of 121639119 is about 495.4780526032.

The spelling of 121639119 in words is "one hundred twenty-one million, six hundred thirty-nine thousand, one hundred nineteen".