211131101111 has 32 divisors (see below), whose sum is σ = 251946393600. Its totient is φ = 173121287040.

The previous prime is 211131101087. The next prime is 211131101117. The reversal of 211131101111 is 111101131112.

It is a cyclic number.

It is not a de Polignac number, because 211131101111 - 2¹⁰ = 211131100087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131101117) 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, 10373501 + ... + 10393833.

It is an arithmetic number, because the mean of its divisors is an integer number (7873324800).

Almost surely, 2^211131101111 is an apocalyptic number.

211131101111 is a deficient number, since it is larger than the sum of its proper divisors (40815292489).

211131101111 is a wasteful number, since it uses less digits than its factorization.

211131101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20919.

The product of its (nonzero) digits is 6, while the sum is 14.

Adding to 211131101111 its reverse (111101131112), we get a palindrome (322232232223).

The spelling of 211131101111 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred one thousand, one hundred eleven".