121738006687 has 8 divisors (see below), whose sum is σ = 132893712000. Its totient is φ = 110597070360.

The previous prime is 121738006681. The next prime is 121738006751. The reversal of 121738006687 is 786600837121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121738006687 - 2¹¹ = 121738004639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121738006687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121738006681) 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 7 ways as a sum of consecutive naturals, for example, 3675003 + ... + 3707980.

It is an arithmetic number, because the mean of its divisors is an integer number (16611714000).

Almost surely, 2^121738006687 is an apocalyptic number.

121738006687 is a deficient number, since it is larger than the sum of its proper divisors (11155705313).

121738006687 is a wasteful number, since it uses less digits than its factorization.

121738006687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7384493.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 121738006687 in words is "one hundred twenty-one billion, seven hundred thirty-eight million, six thousand, six hundred eighty-seven".