21211200120241 has 2 divisors, whose sum is σ = 21211200120242. Its totient is φ = 21211200120240.

The previous prime is 21211200120221. The next prime is 21211200120247. The reversal of 21211200120241 is 14202100211212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21145512480625 + 65687639616 = 4598425^2 + 256296^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211200120241 - 2¹¹ = 21211200118193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211200120247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605600060120 + 10605600060121.

It is an arithmetic number, because the mean of its divisors is an integer number (10605600060121).

Almost surely, 2^{21211200120241} is an apocalyptic number.

It is an amenable number.

21211200120241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211200120241 is an equidigital number, since it uses as much as digits as its factorization.

21211200120241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21211200120241 its reverse (14202100211212), we get a palindrome (35413300331453).

The spelling of 21211200120241 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, one hundred twenty thousand, two hundred forty-one".