121555676056 has 32 divisors (see below), whose sum is σ = 228326009760. Its totient is φ = 60668842752.

The previous prime is 121555676023. The next prime is 121555676083. The reversal of 121555676056 is 650676555121.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 11758666 + ... + 11768998.

It is an arithmetic number, because the mean of its divisors is an integer number (7135187805).

Almost surely, 2^121555676056 is an apocalyptic number.

It is an amenable number.

121555676056 is a deficient number, since it is larger than the sum of its proper divisors (106770333704).

121555676056 is a wasteful number, since it uses less digits than its factorization.

121555676056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12835 (or 12831 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 49.

The spelling of 121555676056 in words is "one hundred twenty-one billion, five hundred fifty-five million, six hundred seventy-six thousand, fifty-six".