121313440241 has 16 divisors (see below), whose sum is σ = 139326816768. Its totient is φ = 103471732800.

The previous prime is 121313440153. The next prime is 121313440247. The reversal of 121313440241 is 142044313121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121313440241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121313440241.

It is not an unprimeable number, because it can be changed into a prime (121313440247) 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, 1518491 + ... + 1596383.

It is an arithmetic number, because the mean of its divisors is an integer number (8707926048).

Almost surely, 2^121313440241 is an apocalyptic number.

It is an amenable number.

121313440241 is a deficient number, since it is larger than the sum of its proper divisors (18013376527).

121313440241 is an equidigital number, since it uses as much as digits as its factorization.

121313440241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78992.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 121313440241 its reverse (142044313121), we get a palindrome (263357753362).

The spelling of 121313440241 in words is "one hundred twenty-one billion, three hundred thirteen million, four hundred forty thousand, two hundred forty-one".