121330550423 has 4 divisors (see below), whose sum is σ = 121604434728. Its totient is φ = 121056666120.

The previous prime is 121330550389. The next prime is 121330550447. The reversal of 121330550423 is 324055033121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121330550423 - 2¹⁰ = 121330549399 is a prime.

It is a super-2 number, since 2×121330550423² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121330550123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136941488 + ... + 136942373.

It is an arithmetic number, because the mean of its divisors is an integer number (30401108682).

Almost surely, 2^121330550423 is an apocalyptic number.

121330550423 is a deficient number, since it is larger than the sum of its proper divisors (273884305).

121330550423 is an equidigital number, since it uses as much as digits as its factorization.

121330550423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273884304.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 121330550423 its reverse (324055033121), we get a palindrome (445385583544).

The spelling of 121330550423 in words is "one hundred twenty-one billion, three hundred thirty million, five hundred fifty thousand, four hundred twenty-three".