121755746477 has 8 divisors (see below), whose sum is σ = 128211343200. Its totient is φ = 115304889744.

The previous prime is 121755746419. The next prime is 121755746491. The reversal of 121755746477 is 774647557121.

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 121755746477 - 2⁸ = 121755746221 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 (121755746407) 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, 1132202 + ... + 1235067.

It is an arithmetic number, because the mean of its divisors is an integer number (16026417900).

Almost surely, 2^121755746477 is an apocalyptic number.

It is an amenable number.

121755746477 is a deficient number, since it is larger than the sum of its proper divisors (6455596723).

121755746477 is a wasteful number, since it uses less digits than its factorization.

121755746477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369995.

The product of its digits is 11524800, while the sum is 56.

The spelling of 121755746477 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-six thousand, four hundred seventy-seven".