21102110002147 has 2 divisors, whose sum is σ = 21102110002148. Its totient is φ = 21102110002146.

The previous prime is 21102110002007. The next prime is 21102110002199. The reversal of 21102110002147 is 74120001120112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102110002147 - 2¹¹ = 21102110000099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102110002747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551055001073 + 10551055001074.

It is an arithmetic number, because the mean of its divisors is an integer number (10551055001074).

Almost surely, 2^{21102110002147} is an apocalyptic number.

21102110002147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102110002147 is an equidigital number, since it uses as much as digits as its factorization.

21102110002147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21102110002147 its reverse (74120001120112), we get a palindrome (95222111122259).

The spelling of 21102110002147 in words is "twenty-one trillion, one hundred two billion, one hundred ten million, two thousand, one hundred forty-seven".