21331310107 has 2 divisors, whose sum is σ = 21331310108. Its totient is φ = 21331310106.

The previous prime is 21331310101. The next prime is 21331310123. The reversal of 21331310107 is 70101313312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331310107 is a prime.

It is not a weakly prime, because it can be changed into another prime (21331310101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665655053 + 10665655054.

It is an arithmetic number, because the mean of its divisors is an integer number (10665655054).

Almost surely, 2^21331310107 is an apocalyptic number.

21331310107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331310107 is an equidigital number, since it uses as much as digits as its factorization.

21331310107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

Adding to 21331310107 its reverse (70101313312), we get a palindrome (91432623419).

The spelling of 21331310107 in words is "twenty-one billion, three hundred thirty-one million, three hundred ten thousand, one hundred seven".