21113222203243 has 2 divisors, whose sum is σ = 21113222203244. Its totient is φ = 21113222203242.

The previous prime is 21113222203189. The next prime is 21113222203261. The reversal of 21113222203243 is 34230222231112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113222203243 - 2³³ = 21104632268651 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113222203643) 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 as a sum of consecutive naturals, namely, 10556611101621 + 10556611101622.

It is an arithmetic number, because the mean of its divisors is an integer number (10556611101622).

Almost surely, 2^{21113222203243} is an apocalyptic number.

21113222203243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113222203243 is an equidigital number, since it uses as much as digits as its factorization.

21113222203243 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21113222203243 its reverse (34230222231112), we get a palindrome (55343444434355).

The spelling of 21113222203243 in words is "twenty-one trillion, one hundred thirteen billion, two hundred twenty-two million, two hundred three thousand, two hundred forty-three".