121665104 has 40 divisors (see below), whose sum is σ = 262027872. Its totient is φ = 54254720.

The previous prime is 121665097. The next prime is 121665119. The reversal of 121665104 is 401566121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2807 + ... + 15849.

Almost surely, 2^121665104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121665104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131013936).

121665104 is an abundant number, since it is smaller than the sum of its proper divisors (140362768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121665104 is a wasteful number, since it uses less digits than its factorization.

121665104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13115 (or 13109 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 121665104 is about 11030.1905695233. The cubic root of 121665104 is about 495.5133320446.

The spelling of 121665104 in words is "one hundred twenty-one million, six hundred sixty-five thousand, one hundred four".