121755717233 has 4 divisors (see below), whose sum is σ = 121843883508. Its totient is φ = 121667550960.

The previous prime is 121755717227. The next prime is 121755717241. The reversal of 121755717233 is 332717557121.

It is a happy number.

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 82143572449 + 39612144784 = 286607^2 + 199028^2 .

It is a cyclic number.

It is not a de Polignac number, because 121755717233 - 2⁶ = 121755717169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121755717253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44081066 + ... + 44083827.

It is an arithmetic number, because the mean of its divisors is an integer number (30460970877).

Almost surely, 2^121755717233 is an apocalyptic number.

It is an amenable number.

121755717233 is a deficient number, since it is larger than the sum of its proper divisors (88166275).

121755717233 is an equidigital number, since it uses as much as digits as its factorization.

121755717233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88166274.

The product of its digits is 308700, while the sum is 44.

The spelling of 121755717233 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred seventeen thousand, two hundred thirty-three".