21002002232243 has 2 divisors, whose sum is σ = 21002002232244. Its totient is φ = 21002002232242.

The previous prime is 21002002232191. The next prime is 21002002232257. The reversal of 21002002232243 is 34223220020012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002002232243 - 2²⁴ = 21001985455027 is a prime.

It is a super-2 number, since 2×21002002232243² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21002002232273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501001116121 + 10501001116122.

It is an arithmetic number, because the mean of its divisors is an integer number (10501001116122).

Almost surely, 2^{21002002232243} is an apocalyptic number.

21002002232243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002002232243 is an equidigital number, since it uses as much as digits as its factorization.

21002002232243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21002002232243 its reverse (34223220020012), we get a palindrome (55225222252255).

The spelling of 21002002232243 in words is "twenty-one trillion, two billion, two million, two hundred thirty-two thousand, two hundred forty-three".