22121204243 has 2 divisors, whose sum is σ = 22121204244. Its totient is φ = 22121204242.

The previous prime is 22121204213. The next prime is 22121204251. The reversal of 22121204243 is 34240212122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121204243 - 2⁸ = 22121203987 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121204213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060602121 + 11060602122.

It is an arithmetic number, because the mean of its divisors is an integer number (11060602122).

Almost surely, 2^22121204243 is an apocalyptic number.

22121204243 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121204243 is an equidigital number, since it uses as much as digits as its factorization.

22121204243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22121204243 its reverse (34240212122), we get a palindrome (56361416365).

The spelling of 22121204243 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, two hundred forty-three".