21330112229 has 2 divisors, whose sum is σ = 21330112230. Its totient is φ = 21330112228.

The previous prime is 21330112207. The next prime is 21330112249. The reversal of 21330112229 is 92221103312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21313080100 + 17032129 = 145990^2 + 4127^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330112229 - 2²⁰ = 21329063653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21330112198 and 21330112207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330112249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665056114 + 10665056115.

It is an arithmetic number, because the mean of its divisors is an integer number (10665056115).

Almost surely, 2^21330112229 is an apocalyptic number.

It is an amenable number.

21330112229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330112229 is an equidigital number, since it uses as much as digits as its factorization.

21330112229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21330112229 in words is "twenty-one billion, three hundred thirty million, one hundred twelve thousand, two hundred twenty-nine".