12211011221111 has 2 divisors, whose sum is σ = 12211011221112. Its totient is φ = 12211011221110.

The previous prime is 12211011221093. The next prime is 12211011221177. The reversal of 12211011221111 is 11112211011221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211011221111 - 2¹⁰ = 12211011220087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12211011221111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211011221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105505610555 + 6105505610556.

It is an arithmetic number, because the mean of its divisors is an integer number (6105505610556).

Almost surely, 2^{12211011221111} is an apocalyptic number.

12211011221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211011221111 is an equidigital number, since it uses as much as digits as its factorization.

12211011221111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12211011221111 its reverse (11112211011221), we get a palindrome (23323222232332).

It can be divided in two parts, 12211011221 and 111, that multiplied together give a palindrome (1355422245531).

The spelling of 12211011221111 in words is "twelve trillion, two hundred eleven billion, eleven million, two hundred twenty-one thousand, one hundred eleven".