21130202203247 has 2 divisors, whose sum is σ = 21130202203248. Its totient is φ = 21130202203246.

The previous prime is 21130202203193. The next prime is 21130202203289. The reversal of 21130202203247 is 74230220203112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130202203247 - 2¹⁶ = 21130202137711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130202202247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565101101623 + 10565101101624.

It is an arithmetic number, because the mean of its divisors is an integer number (10565101101624).

Almost surely, 2^{21130202203247} is an apocalyptic number.

21130202203247 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130202203247 is an equidigital number, since it uses as much as digits as its factorization.

21130202203247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 21130202203247 its reverse (74230220203112), we get a palindrome (95360422406359).

The spelling of 21130202203247 in words is "twenty-one trillion, one hundred thirty billion, two hundred two million, two hundred three thousand, two hundred forty-seven".