211001231 has 8 divisors (see below), whose sum is σ = 241234560. Its totient is φ = 180790488.

The previous prime is 211001227. The next prime is 211001243. The reversal of 211001231 is 132100112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211001231 - 2² = 211001227 is a prime.

It is a super-2 number, since 2×211001231² = 89043038967030722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26900 + ... + 33846.

It is an arithmetic number, because the mean of its divisors is an integer number (30154320).

Almost surely, 2^211001231 is an apocalyptic number.

211001231 is a deficient number, since it is larger than the sum of its proper divisors (30233329).

211001231 is an equidigital number, since it uses as much as digits as its factorization.

211001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11293.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 211001231 is about 14525.8814190396. The cubic root of 211001231 is about 595.3353390626.

Adding to 211001231 its reverse (132100112), we get a palindrome (343101343).

The spelling of 211001231 in words is "two hundred eleven million, one thousand, two hundred thirty-one".