1211111132211 has 96 divisors (see below), whose sum is σ = 1906634496000. Its totient is φ = 738199630080.

The previous prime is 1211111132207. The next prime is 1211111132239. The reversal of 1211111132211 is 1122311111121.

1211111132211 is a `hidden beast` number, since 1 + 211 + 111 + 132 + 211 = 666.

It is not a de Polignac number, because 1211111132211 - 2² = 1211111132207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211111132201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 462078481 + ... + 462081101.

It is an arithmetic number, because the mean of its divisors is an integer number (19860776000).

Almost surely, 2^{1211111132211} is an apocalyptic number.

1211111132211 is a deficient number, since it is larger than the sum of its proper divisors (695523363789).

1211111132211 is a wasteful number, since it uses less digits than its factorization.

1211111132211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249 (or 3246 counting only the distinct ones).

The product of its digits is 24, while the sum is 18.

Adding to 1211111132211 its reverse (1122311111121), we get a palindrome (2333422243332).

The spelling of 1211111132211 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred thirty-two thousand, two hundred eleven".