21000112002241 has 2 divisors, whose sum is σ = 21000112002242. Its totient is φ = 21000112002240.

The previous prime is 21000112002239. The next prime is 21000112002257. The reversal of 21000112002241 is 14220021100012.

It is an a-pointer prime, because the next prime (21000112002257) can be obtained adding 21000112002241 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20659206657600 + 340905344641 = 4545240^2 + 583871^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000112002241 - 2¹ = 21000112002239 is a prime.

Together with 21000112002239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21000112002841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500056001120 + 10500056001121.

It is an arithmetic number, because the mean of its divisors is an integer number (10500056001121).

Almost surely, 2^{21000112002241} is an apocalyptic number.

It is an amenable number.

21000112002241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000112002241 is an equidigital number, since it uses as much as digits as its factorization.

21000112002241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21000112002241 its reverse (14220021100012), we get a palindrome (35220133102253).

The spelling of 21000112002241 in words is "twenty-one trillion, one hundred twelve million, two thousand, two hundred forty-one".