121342240243 has 32 divisors (see below), whose sum is σ = 148878259200. Its totient is φ = 96577992576.

The previous prime is 121342240211. The next prime is 121342240291. The reversal of 121342240243 is 342042243121.

It is a cyclic number.

It is not a de Polignac number, because 121342240243 - 2⁵ = 121342240211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121342240543) 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, 7527330 + ... + 7543432.

It is an arithmetic number, because the mean of its divisors is an integer number (4652445600).

Almost surely, 2^121342240243 is an apocalyptic number.

121342240243 is a deficient number, since it is larger than the sum of its proper divisors (27536018957).

121342240243 is a wasteful number, since it uses less digits than its factorization.

121342240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251.

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

Adding to 121342240243 its reverse (342042243121), we get a palindrome (463384483364).

The spelling of 121342240243 in words is "one hundred twenty-one billion, three hundred forty-two million, two hundred forty thousand, two hundred forty-three".