121353656 has 8 divisors (see below), whose sum is σ = 227538120. Its totient is φ = 60676824.

The previous prime is 121353649. The next prime is 121353677. The reversal of 121353656 is 656353121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7584596 + ... + 7584611.

It is an arithmetic number, because the mean of its divisors is an integer number (28442265).

Almost surely, 2^121353656 is an apocalyptic number.

It is an amenable number.

121353656 is a deficient number, since it is larger than the sum of its proper divisors (106184464).

121353656 is a wasteful number, since it uses less digits than its factorization.

121353656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15169213 (or 15169209 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 121353656 is about 11016.0635437528. The cubic root of 121353656 is about 495.0901526102.

The spelling of 121353656 in words is "one hundred twenty-one million, three hundred fifty-three thousand, six hundred fifty-six".