121643056 has 40 divisors (see below), whose sum is σ = 243828144. Its totient is φ = 58755840.

The previous prime is 121643029. The next prime is 121643069. The reversal of 121643056 is 650346121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55746 + ... + 57886.

Almost surely, 2^121643056 is an apocalyptic number.

121643056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121643056 is an abundant number, since it is smaller than the sum of its proper divisors (122185088).

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

121643056 is a wasteful number, since it uses less digits than its factorization.

121643056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2263 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 121643056 is about 11029.1910854786. The cubic root of 121643056 is about 495.4833981315.

Adding to 121643056 its reverse (650346121), we get a palindrome (771989177).

The spelling of 121643056 in words is "one hundred twenty-one million, six hundred forty-three thousand, fifty-six".