121320334143243 has 20 divisors (see below), whose sum is σ = 181540352430360. Its totient is φ = 80742437001792.

The previous prime is 121320334143221. The next prime is 121320334143287. The reversal of 121320334143243 is 342341433023121.

121320334143243 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 203 + 3 + 414 + 32 + 4 + 3 = 666.

It is not a de Polignac number, because 121320334143243 - 2³⁴ = 121303154274059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121320334143198 and 121320334143207.

It is not an unprimeable number, because it can be changed into a prime (121320334143293) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1275746238 + ... + 1275841331.

It is an arithmetic number, because the mean of its divisors is an integer number (9077017621518).

Almost surely, 2^{121320334143243} is an apocalyptic number.

121320334143243 is a deficient number, since it is larger than the sum of its proper divisors (60220018287117).

121320334143243 is an equidigital number, since it uses as much as digits as its factorization.

121320334143243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551588168 (or 2551588159 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

Adding to 121320334143243 its reverse (342341433023121), we get a palindrome (463661767166364).

The spelling of 121320334143243 in words is "one hundred twenty-one trillion, three hundred twenty billion, three hundred thirty-four million, one hundred forty-three thousand, two hundred forty-three".