121200340311 has 16 divisors (see below), whose sum is σ = 190118181600. Its totient is φ = 76047272064.

The previous prime is 121200340271. The next prime is 121200340321. The reversal of 121200340311 is 113043002121.

121200340311 is a `hidden beast` number, since 1 + 2 + 12 + 0 + 0 + 340 + 311 = 666.

It is not a de Polignac number, because 121200340311 - 2¹⁴ = 121200323927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200340321) 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 15 ways as a sum of consecutive naturals, for example, 132026056 + ... + 132026973.

It is an arithmetic number, because the mean of its divisors is an integer number (11882386350).

Almost surely, 2^121200340311 is an apocalyptic number.

121200340311 is a deficient number, since it is larger than the sum of its proper divisors (68917841289).

121200340311 is a wasteful number, since it uses less digits than its factorization.

121200340311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264053055 (or 264053049 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121200340311 its reverse (113043002121), we get a palindrome (234243342432).

The spelling of 121200340311 in words is "one hundred twenty-one billion, two hundred million, three hundred forty thousand, three hundred eleven".