12122221001243 has 2 divisors, whose sum is σ = 12122221001244. Its totient is φ = 12122221001242.

The previous prime is 12122221001221. The next prime is 12122221001291. The reversal of 12122221001243 is 34210012222121.

12122221001243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12122221001243 - 2¹⁶ = 12122220935707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122221006243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061110500621 + 6061110500622.

It is an arithmetic number, because the mean of its divisors is an integer number (6061110500622).

Almost surely, 2^{12122221001243} is an apocalyptic number.

12122221001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122221001243 is an equidigital number, since it uses as much as digits as its factorization.

12122221001243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12122221001243 its reverse (34210012222121), we get a palindrome (46332233223364).

The spelling of 12122221001243 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, one thousand, two hundred forty-three".