121305320242043 has 16 divisors (see below), whose sum is σ = 141584879176704. Its totient is φ = 101763335489280.

The previous prime is 121305320242033. The next prime is 121305320242061. The reversal of 121305320242043 is 340242023503121.

It is a cyclic number.

It is not a de Polignac number, because 121305320242043 - 2⁶ = 121305320241979 is a prime.

It is a super-2 number, since 2×121305320242043² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121305320242033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108641963 + ... + 109752843.

It is an arithmetic number, because the mean of its divisors is an integer number (8849054948544).

Almost surely, 2^{121305320242043} is an apocalyptic number.

121305320242043 is a deficient number, since it is larger than the sum of its proper divisors (20279558934661).

121305320242043 is a wasteful number, since it uses less digits than its factorization.

121305320242043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442842.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 121305320242043 its reverse (340242023503121), we get a palindrome (461547343745164).

The spelling of 121305320242043 in words is "one hundred twenty-one trillion, three hundred five billion, three hundred twenty million, two hundred forty-two thousand, forty-three".