21611241737297 has 2 divisors, whose sum is σ = 21611241737298. Its totient is φ = 21611241737296.

The previous prime is 21611241737237. The next prime is 21611241737329. The reversal of 21611241737297 is 79273714211612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20391356831041 + 1219884906256 = 4515679^2 + 1104484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21611241737297 is a prime.

It is not a weakly prime, because it can be changed into another prime (21611241737237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805620868648 + 10805620868649.

It is an arithmetic number, because the mean of its divisors is an integer number (10805620868649).

Almost surely, 2^{21611241737297} is an apocalyptic number.

It is an amenable number.

21611241737297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21611241737297 is an equidigital number, since it uses as much as digits as its factorization.

21611241737297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The spelling of 21611241737297 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-one million, seven hundred thirty-seven thousand, two hundred ninety-seven".