121755773711 has 8 divisors (see below), whose sum is σ = 143041748304. Its totient is φ = 102172677120.

The previous prime is 121755773681. The next prime is 121755773743. The reversal of 121755773711 is 117377557121.

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 121755773711 - 2¹⁸ = 121755511567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755773771) 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, 425719346 + ... + 425719631.

It is an arithmetic number, because the mean of its divisors is an integer number (17880218538).

Almost surely, 2^121755773711 is an apocalyptic number.

121755773711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121755773711 is a deficient number, since it is larger than the sum of its proper divisors (21285974593).

121755773711 is a wasteful number, since it uses less digits than its factorization.

121755773711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851439001.

The product of its digits is 360150, while the sum is 47.

The spelling of 121755773711 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred seventy-three thousand, seven hundred eleven".