121751671655 has 8 divisors (see below), whose sum is σ = 146108826384. Its totient is φ = 97396790400.

The previous prime is 121751671651. The next prime is 121751671693. The reversal of 121751671655 is 556176157121.

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

It is not a de Polignac number, because 121751671655 - 2² = 121751671651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121751671651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448241 + ... + 666650.

It is an arithmetic number, because the mean of its divisors is an integer number (18263603298).

Almost surely, 2^121751671655 is an apocalyptic number.

121751671655 is a deficient number, since it is larger than the sum of its proper divisors (24357154729).

121751671655 is a wasteful number, since it uses less digits than its factorization.

121751671655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136737.

The product of its digits is 441000, while the sum is 47.

The spelling of 121751671655 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred seventy-one thousand, six hundred fifty-five".