121420324243 has 32 divisors (see below), whose sum is σ = 130037386752. Its totient is φ = 113179852800.

The previous prime is 121420324237. The next prime is 121420324247. The reversal of 121420324243 is 342423024121.

It is a cyclic number.

It is not a de Polignac number, because 121420324243 - 2²⁹ = 120883453331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121420324247) 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 31 ways as a sum of consecutive naturals, for example, 33604705 + ... + 33608317.

It is an arithmetic number, because the mean of its divisors is an integer number (4063668336).

Almost surely, 2^121420324243 is an apocalyptic number.

121420324243 is a deficient number, since it is larger than the sum of its proper divisors (8617062509).

121420324243 is a wasteful number, since it uses less digits than its factorization.

121420324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 121420324243 its reverse (342423024121), we get a palindrome (463843348364).

The spelling of 121420324243 in words is "one hundred twenty-one billion, four hundred twenty million, three hundred twenty-four thousand, two hundred forty-three".