1211213332111 has 2 divisors, whose sum is σ = 1211213332112. Its totient is φ = 1211213332110.

The previous prime is 1211213331997. The next prime is 1211213332177. The reversal of 1211213332111 is 1112333121121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211213332111 - 2²⁷ = 1211079114383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211213332181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605606666055 + 605606666056.

It is an arithmetic number, because the mean of its divisors is an integer number (605606666056).

Almost surely, 2^{1211213332111} is an apocalyptic number.

1211213332111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211213332111 is an equidigital number, since it uses as much as digits as its factorization.

1211213332111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

Adding to 1211213332111 its reverse (1112333121121), we get a palindrome (2323546453232).

The spelling of 1211213332111 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, three hundred thirty-two thousand, one hundred eleven".