121755673517 has 8 divisors (see below), whose sum is σ = 128167082400. Its totient is φ = 115344586224.

The previous prime is 121755673489. The next prime is 121755673541. The reversal of 121755673517 is 715376557121.

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

It is not a de Polignac number, because 121755673517 - 2¹⁸ = 121755411373 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 (121755673717) 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, 1343834 + ... + 1431572.

It is an arithmetic number, because the mean of its divisors is an integer number (16020885300).

Almost surely, 2^121755673517 is an apocalyptic number.

It is an amenable number.

121755673517 is a deficient number, since it is larger than the sum of its proper divisors (6411408883).

121755673517 is an equidigital number, since it uses as much as digits as its factorization.

121755673517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160795.

The product of its digits is 1543500, while the sum is 50.

The spelling of 121755673517 in words is "one hundred twenty-one billion, seven hundred fifty-five million, six hundred seventy-three thousand, five hundred seventeen".