211100011231 has 2 divisors, whose sum is σ = 211100011232. Its totient is φ = 211100011230.

The previous prime is 211100011229. The next prime is 211100011249. The reversal of 211100011231 is 132110001112.

It is a happy number.

211100011231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211100011231 - 2¹ = 211100011229 is a prime.

It is a super-2 number, since 2×211100011231² (a number of 23 digits) contains 22 as substring.

Together with 211100011229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211100011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550005615 + 105550005616.

It is an arithmetic number, because the mean of its divisors is an integer number (105550005616).

Almost surely, 2^211100011231 is an apocalyptic number.

211100011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

211100011231 is an equidigital number, since it uses as much as digits as its factorization.

211100011231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211100011231 its reverse (132110001112), we get a palindrome (343210012343).

The spelling of 211100011231 in words is "two hundred eleven billion, one hundred million, eleven thousand, two hundred thirty-one".