121241203313 has 4 divisors (see below), whose sum is σ = 128373038820. Its totient is φ = 114109367808.

The previous prime is 121241203289. The next prime is 121241203327. The reversal of 121241203313 is 313302142121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90211323904 + 31029879409 = 300352^2 + 176153^2 .

It is a cyclic number.

It is not a de Polignac number, because 121241203313 - 2¹⁸ = 121240941169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121241253313) 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 3 ways as a sum of consecutive naturals, for example, 3565917728 + ... + 3565917761.

It is an arithmetic number, because the mean of its divisors is an integer number (32093259705).

Almost surely, 2^121241203313 is an apocalyptic number.

It is an amenable number.

121241203313 is a deficient number, since it is larger than the sum of its proper divisors (7131835507).

121241203313 is an equidigital number, since it uses as much as digits as its factorization.

121241203313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131835506.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121241203313 its reverse (313302142121), we get a palindrome (434543345434).

The spelling of 121241203313 in words is "one hundred twenty-one billion, two hundred forty-one million, two hundred three thousand, three hundred thirteen".