21110232263 has 2 divisors, whose sum is σ = 21110232264. Its totient is φ = 21110232262.

The previous prime is 21110232217. The next prime is 21110232271. The reversal of 21110232263 is 36223201112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110232263 - 2²² = 21106037959 is a prime.

It is a super-2 number, since 2×21110232263² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110237263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555116131 + 10555116132.

It is an arithmetic number, because the mean of its divisors is an integer number (10555116132).

Almost surely, 2^21110232263 is an apocalyptic number.

21110232263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110232263 is an equidigital number, since it uses as much as digits as its factorization.

21110232263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21110232263 its reverse (36223201112), we get a palindrome (57333433375).

The spelling of 21110232263 in words is "twenty-one billion, one hundred ten million, two hundred thirty-two thousand, two hundred sixty-three".