21100022263 has 2 divisors, whose sum is σ = 21100022264. Its totient is φ = 21100022262.

The previous prime is 21100022173. The next prime is 21100022267. The reversal of 21100022263 is 36222000112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100022263 - 2³³ = 12510087671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100022263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100022267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550011131 + 10550011132.

It is an arithmetic number, because the mean of its divisors is an integer number (10550011132).

Almost surely, 2^21100022263 is an apocalyptic number.

21100022263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100022263 is an equidigital number, since it uses as much as digits as its factorization.

21100022263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21100022263 its reverse (36222000112), we get a palindrome (57322022375).

The spelling of 21100022263 in words is "twenty-one billion, one hundred million, twenty-two thousand, two hundred sixty-three".