21330112207 has 2 divisors, whose sum is σ = 21330112208. Its totient is φ = 21330112206.

The previous prime is 21330112189. The next prime is 21330112229. The reversal of 21330112207 is 70221103312.

It is a happy number.

It is an a-pointer prime, because the next prime (21330112229) can be obtained adding 21330112207 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21330112207 - 2¹¹ = 21330110159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330116207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665056103 + 10665056104.

It is an arithmetic number, because the mean of its divisors is an integer number (10665056104).

Almost surely, 2^21330112207 is an apocalyptic number.

21330112207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330112207 is an equidigital number, since it uses as much as digits as its factorization.

21330112207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 21330112207 its reverse (70221103312), we get a palindrome (91551215519).

The spelling of 21330112207 in words is "twenty-one billion, three hundred thirty million, one hundred twelve thousand, two hundred seven".