203211222312 has 128 divisors (see below), whose sum is σ = 601190553600. Its totient is φ = 56005420800.

The previous prime is 203211222311. The next prime is 203211222419. The reversal of 203211222312 is 213222112302.

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

It is not an unprimeable number, because it can be changed into a prime (203211222311) 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 31 ways as a sum of consecutive naturals, for example, 5296237 + ... + 5334467.

It is an arithmetic number, because the mean of its divisors is an integer number (4696801200).

Almost surely, 2^203211222312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203211222312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300595276800).

203211222312 is an abundant number, since it is smaller than the sum of its proper divisors (397979331288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203211222312 is a wasteful number, since it uses less digits than its factorization.

203211222312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39367 (or 39363 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 203211222312 its reverse (213222112302), we get a palindrome (416433334614).

The spelling of 203211222312 in words is "two hundred three billion, two hundred eleven million, two hundred twenty-two thousand, three hundred twelve".