121751556364 has 12 divisors (see below), whose sum is σ = 213111746064. Its totient is φ = 60862486064.

The previous prime is 121751556361. The next prime is 121751556371. The reversal of 121751556364 is 463655157121.

It is not an unprimeable number, because it can be changed into a prime (121751556361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3302407 + ... + 3339070.

It is an arithmetic number, because the mean of its divisors is an integer number (17759312172).

Almost surely, 2^121751556364 is an apocalyptic number.

It is an amenable number.

121751556364 is a deficient number, since it is larger than the sum of its proper divisors (91360189700).

121751556364 is a wasteful number, since it uses less digits than its factorization.

121751556364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646064 (or 6646062 counting only the distinct ones).

The product of its digits is 756000, while the sum is 46.

The spelling of 121751556364 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred fifty-six thousand, three hundred sixty-four".