121313222443 has 16 divisors (see below), whose sum is σ = 143595648000. Its totient is φ = 100277345952.

The previous prime is 121313222383. The next prime is 121313222473. The reversal of 121313222443 is 344222313121.

It is a de Polignac number, because none of the positive numbers 2^k-121313222443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121313222473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185823 + ... + 526456.

It is an arithmetic number, because the mean of its divisors is an integer number (8974728000).

Almost surely, 2^121313222443 is an apocalyptic number.

121313222443 is a deficient number, since it is larger than the sum of its proper divisors (22282425557).

121313222443 is an equidigital number, since it uses as much as digits as its factorization.

121313222443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713154.

The product of its digits is 6912, while the sum is 28.

Adding to 121313222443 its reverse (344222313121), we get a palindrome (465535535564).

The spelling of 121313222443 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred twenty-two thousand, four hundred forty-three".