211242204653 has 2 divisors, whose sum is σ = 211242204654. Its totient is φ = 211242204652.

The previous prime is 211242204643. The next prime is 211242204721. The reversal of 211242204653 is 356402242112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131002011364 + 80240193289 = 361942^2 + 283267^2 .

It is a cyclic number.

It is not a de Polignac number, because 211242204653 - 2¹⁶ = 211242139117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211242204643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105621102326 + 105621102327.

It is an arithmetic number, because the mean of its divisors is an integer number (105621102327).

Almost surely, 2^211242204653 is an apocalyptic number.

It is an amenable number.

211242204653 is a deficient number, since it is larger than the sum of its proper divisors (1).

211242204653 is an equidigital number, since it uses as much as digits as its factorization.

211242204653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 211242204653 its reverse (356402242112), we get a palindrome (567644446765).

The spelling of 211242204653 in words is "two hundred eleven billion, two hundred forty-two million, two hundred four thousand, six hundred fifty-three".