121755710353 has 4 divisors (see below), whose sum is σ = 128917810980. Its totient is φ = 114593609728.

The previous prime is 121755710299. The next prime is 121755710411. The reversal of 121755710353 is 353017557121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94364467344 + 27391243009 = 307188^2 + 165503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121755710353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121755110353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3581050288 + ... + 3581050321.

It is an arithmetic number, because the mean of its divisors is an integer number (32229452745).

Almost surely, 2^121755710353 is an apocalyptic number.

It is an amenable number.

121755710353 is a deficient number, since it is larger than the sum of its proper divisors (7162100627).

121755710353 is an equidigital number, since it uses as much as digits as its factorization.

121755710353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162100626.

The product of its (nonzero) digits is 110250, while the sum is 40.

The spelling of 121755710353 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred ten thousand, three hundred fifty-three".