1211133213111 has 32 divisors (see below), whose sum is σ = 1763375505408. Its totient is φ = 736409318400.

The previous prime is 1211133213091. The next prime is 1211133213167. The reversal of 1211133213111 is 1113123311121.

It is not a de Polignac number, because 1211133213111 - 2⁵ = 1211133213079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211133214111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1895790 + ... + 2452811.

It is an arithmetic number, because the mean of its divisors is an integer number (55105484544).

Almost surely, 2^{1211133213111} is an apocalyptic number.

1211133213111 is a deficient number, since it is larger than the sum of its proper divisors (552242292297).

1211133213111 is a wasteful number, since it uses less digits than its factorization.

1211133213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348791.

The product of its digits is 108, while the sum is 21.

Adding to 1211133213111 its reverse (1113123311121), we get a palindrome (2324256524232).

The spelling of 1211133213111 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, two hundred thirteen thousand, one hundred eleven".