121881696 has 24 divisors (see below), whose sum is σ = 319939704. Its totient is φ = 40627200.

The previous prime is 121881659. The next prime is 121881701. The reversal of 121881696 is 696188121.

It is a tau number, because it is divible by the number of its divisors (24).

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 3 ways as a sum of consecutive naturals, for example, 634705 + ... + 634896.

It is an arithmetic number, because the mean of its divisors is an integer number (13330821).

Almost surely, 2^121881696 is an apocalyptic number.

121881696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121881696 is an abundant number, since it is smaller than the sum of its proper divisors (198058008).

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

121881696 is a wasteful number, since it uses less digits than its factorization.

121881696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269614 (or 1269606 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 121881696 is about 11040.0043478252. The cubic root of 121881696 is about 495.8072004744.

The spelling of 121881696 in words is "one hundred twenty-one million, eight hundred eighty-one thousand, six hundred ninety-six".