21001000112263 has 2 divisors, whose sum is σ = 21001000112264. Its totient is φ = 21001000112262.

The previous prime is 21001000112237. The next prime is 21001000112297. The reversal of 21001000112263 is 36221100010012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001000112263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21001000112263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001000142263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500500056131 + 10500500056132.

It is an arithmetic number, because the mean of its divisors is an integer number (10500500056132).

Almost surely, 2^{21001000112263} is an apocalyptic number.

21001000112263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001000112263 is an equidigital number, since it uses as much as digits as its factorization.

21001000112263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21001000112263 its reverse (36221100010012), we get a palindrome (57222100122275).

The spelling of 21001000112263 in words is "twenty-one trillion, one billion, one hundred twelve thousand, two hundred sixty-three".