21200311241 has 2 divisors, whose sum is σ = 21200311242. Its totient is φ = 21200311240.

The previous prime is 21200311229. The next prime is 21200311273. The reversal of 21200311241 is 14211300212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17528436025 + 3671875216 = 132395^2 + 60596^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200311241 - 2²² = 21196116937 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200311441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600155620 + 10600155621.

It is an arithmetic number, because the mean of its divisors is an integer number (10600155621).

Almost surely, 2^21200311241 is an apocalyptic number.

It is an amenable number.

21200311241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200311241 is an equidigital number, since it uses as much as digits as its factorization.

21200311241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21200311241 its reverse (14211300212), we get a palindrome (35411611453).

The spelling of 21200311241 in words is "twenty-one billion, two hundred million, three hundred eleven thousand, two hundred forty-one".