210221211010247 has 2 divisors, whose sum is σ = 210221211010248. Its totient is φ = 210221211010246.

The previous prime is 210221211010163. The next prime is 210221211010253. The reversal of 210221211010247 is 742010112122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210221211010247 - 2¹² = 210221211006151 is a prime.

It is a super-2 number, since 2×210221211010247² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221211019247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110605505123 + 105110605505124.

It is an arithmetic number, because the mean of its divisors is an integer number (105110605505124).

Almost surely, 2^{210221211010247} is an apocalyptic number.

210221211010247 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221211010247 is an equidigital number, since it uses as much as digits as its factorization.

210221211010247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 210221211010247 its reverse (742010112122012), we get a palindrome (952231323132259).

The spelling of 210221211010247 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred forty-seven".