121181128753 has 4 divisors (see below), whose sum is σ = 121235302260. Its totient is φ = 121126955248.

The previous prime is 121181128727. The next prime is 121181128763. The reversal of 121181128753 is 357821181121.

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 59899136049 + 61281992704 = 244743^2 + 247552^2 .

It is a cyclic number.

It is not a de Polignac number, because 121181128753 - 2⁹ = 121181128241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121181128763) 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, 27083398 + ... + 27087871.

It is an arithmetic number, because the mean of its divisors is an integer number (30308825565).

Almost surely, 2^121181128753 is an apocalyptic number.

It is an amenable number.

121181128753 is a deficient number, since it is larger than the sum of its proper divisors (54173507).

121181128753 is an equidigital number, since it uses as much as digits as its factorization.

121181128753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54173506.

The product of its digits is 26880, while the sum is 40.

The spelling of 121181128753 in words is "one hundred twenty-one billion, one hundred eighty-one million, one hundred twenty-eight thousand, seven hundred fifty-three".