211231223303 has 4 divisors (see below), whose sum is σ = 211521775920. Its totient is φ = 210940670688.

The previous prime is 211231223249. The next prime is 211231223311. The reversal of 211231223303 is 303322132112.

211231223303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211231223303 - 2⁶ = 211231223239 is a prime.

It is a super-4 number, since 4×211231223303⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231223353) 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 in 3 ways as a sum of consecutive naturals, for example, 145275218 + ... + 145276671.

It is an arithmetic number, because the mean of its divisors is an integer number (52880443980).

Almost surely, 2^211231223303 is an apocalyptic number.

211231223303 is a deficient number, since it is larger than the sum of its proper divisors (290552617).

211231223303 is an equidigital number, since it uses as much as digits as its factorization.

211231223303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290552616.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 211231223303 its reverse (303322132112), we get a palindrome (514553355415).

The spelling of 211231223303 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred twenty-three thousand, three hundred three".