211123132311 has 64 divisors (see below), whose sum is σ = 376753241088. Its totient is φ = 101978155008.

The previous prime is 211123132303. The next prime is 211123132349. The reversal of 211123132311 is 113231321112.

It is not a de Polignac number, because 211123132311 - 2³ = 211123132303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123132391) 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 63 ways as a sum of consecutive naturals, for example, 443025 + ... + 786458.

It is an arithmetic number, because the mean of its divisors is an integer number (5886769392).

Almost surely, 2^211123132311 is an apocalyptic number.

211123132311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211123132311 is a deficient number, since it is larger than the sum of its proper divisors (165630108777).

211123132311 is a wasteful number, since it uses less digits than its factorization.

211123132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229560.

The product of its digits is 216, while the sum is 21.

Adding to 211123132311 its reverse (113231321112), we get a palindrome (324354453423).

The spelling of 211123132311 in words is "two hundred eleven billion, one hundred twenty-three million, one hundred thirty-two thousand, three hundred eleven".