21202132203247 has 2 divisors, whose sum is σ = 21202132203248. Its totient is φ = 21202132203246.

The previous prime is 21202132203193. The next prime is 21202132203281. The reversal of 21202132203247 is 74230223120212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202132203247 - 2²³ = 21202123814639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202132200247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601066101623 + 10601066101624.

It is an arithmetic number, because the mean of its divisors is an integer number (10601066101624).

Almost surely, 2^{21202132203247} is an apocalyptic number.

21202132203247 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202132203247 is an equidigital number, since it uses as much as digits as its factorization.

21202132203247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 21202132203247 its reverse (74230223120212), we get a palindrome (95432355323459).

The spelling of 21202132203247 in words is "twenty-one trillion, two hundred two billion, one hundred thirty-two million, two hundred three thousand, two hundred forty-seven".