21133223113 has 2 divisors, whose sum is σ = 21133223114. Its totient is φ = 21133223112.

The previous prime is 21133223071. The next prime is 21133223117. The reversal of 21133223113 is 31132233112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15862898704 + 5270324409 = 125948^2 + 72597^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133223113 - 2⁹ = 21133222601 is a prime.

It is a super-2 number, since 2×21133223113² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21133223117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566611556 + 10566611557.

It is an arithmetic number, because the mean of its divisors is an integer number (10566611557).

Almost surely, 2^21133223113 is an apocalyptic number.

It is an amenable number.

21133223113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133223113 is an equidigital number, since it uses as much as digits as its factorization.

21133223113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

Adding to 21133223113 its reverse (31132233112), we get a palindrome (52265456225).

Subtracting 21133223113 from its reverse (31132233112), we obtain a palindrome (9999009999).

The spelling of 21133223113 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty-three thousand, one hundred thirteen".