21130011223 has 2 divisors, whose sum is σ = 21130011224. Its totient is φ = 21130011222.

The previous prime is 21130011193. The next prime is 21130011241. The reversal of 21130011223 is 32211003112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130011223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130011197 and 21130011206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130011293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565005611 + 10565005612.

It is an arithmetic number, because the mean of its divisors is an integer number (10565005612).

Almost surely, 2^21130011223 is an apocalyptic number.

21130011223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130011223 is an equidigital number, since it uses as much as digits as its factorization.

21130011223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21130011223 its reverse (32211003112), we get a palindrome (53341014335).

The spelling of 21130011223 in words is "twenty-one billion, one hundred thirty million, eleven thousand, two hundred twenty-three".