21302210012177 has 2 divisors, whose sum is σ = 21302210012178. Its totient is φ = 21302210012176.

The previous prime is 21302210012089. The next prime is 21302210012221. The reversal of 21302210012177 is 77121001220312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18798043020241 + 2504166991936 = 4335671^2 + 1582456^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302210012177 - 2⁴² = 16904163501073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302210812177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651105006088 + 10651105006089.

It is an arithmetic number, because the mean of its divisors is an integer number (10651105006089).

Almost surely, 2^{21302210012177} is an apocalyptic number.

It is an amenable number.

21302210012177 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302210012177 is an equidigital number, since it uses as much as digits as its factorization.

21302210012177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 21302210012177 its reverse (77121001220312), we get a palindrome (98423211232489).

The spelling of 21302210012177 in words is "twenty-one trillion, three hundred two billion, two hundred ten million, twelve thousand, one hundred seventy-seven".