12211210016611 has 2 divisors, whose sum is σ = 12211210016612. Its totient is φ = 12211210016610.

The previous prime is 12211210016549. The next prime is 12211210016669. The reversal of 12211210016611 is 11661001211221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12211210016611 - 2⁷ = 12211210016483 is a prime.

It is a super-2 number, since 2×12211210016611² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12211219016611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105605008305 + 6105605008306.

It is an arithmetic number, because the mean of its divisors is an integer number (6105605008306).

Almost surely, 2^{12211210016611} is an apocalyptic number.

12211210016611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211210016611 is an equidigital number, since it uses as much as digits as its factorization.

12211210016611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 12211210016611 its reverse (11661001211221), we get a palindrome (23872211227832).

The spelling of 12211210016611 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, sixteen thousand, six hundred eleven".