211231223204 has 24 divisors (see below), whose sum is σ = 378563465280. Its totient is φ = 103074287904.

The previous prime is 211231223201. The next prime is 211231223233. The reversal of 211231223204 is 402322132112.

211231223204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211231223204.

It is not an unprimeable number, because it can be changed into a prime (211231223201) 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 7 ways as a sum of consecutive naturals, for example, 297584 + ... + 714855.

It is an arithmetic number, because the mean of its divisors is an integer number (15773477720).

Almost surely, 2^211231223204 is an apocalyptic number.

It is an amenable number.

211231223204 is a deficient number, since it is larger than the sum of its proper divisors (167332242076).

211231223204 is a wasteful number, since it uses less digits than its factorization.

211231223204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013699 (or 1013697 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211231223204 its reverse (402322132112), we get a palindrome (613553355316).

The spelling of 211231223204 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred twenty-three thousand, two hundred four".