21202011241 has 2 divisors, whose sum is σ = 21202011242. Its totient is φ = 21202011240.

The previous prime is 21202011199. The next prime is 21202011253. The reversal of 21202011241 is 14211020212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11444720400 + 9757290841 = 106980^2 + 98779^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202011241 - 2⁷ = 21202011113 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202011541) 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, 10601005620 + 10601005621.

It is an arithmetic number, because the mean of its divisors is an integer number (10601005621).

Almost surely, 2^21202011241 is an apocalyptic number.

It is an amenable number.

21202011241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202011241 is an equidigital number, since it uses as much as digits as its factorization.

21202011241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202011241 its reverse (14211020212), we get a palindrome (35413031453).

The spelling of 21202011241 in words is "twenty-one billion, two hundred two million, eleven thousand, two hundred forty-one".