203211312330 has 128 divisors (see below), whose sum is σ = 528272720640. Its totient is φ = 49731655680.

The previous prime is 203211312277. The next prime is 203211312341. The reversal of 203211312330 is 33213112302.

203211312330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203211312297 and 203211312306.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55779489 + ... + 55783131.

It is an arithmetic number, because the mean of its divisors is an integer number (4127130630).

Almost surely, 2^203211312330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203211312330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264136360320).

203211312330 is an abundant number, since it is smaller than the sum of its proper divisors (325061408310).

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

203211312330 is a wasteful number, since it uses less digits than its factorization.

203211312330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 203211312330 its reverse (33213112302), we get a palindrome (236424424632).

The spelling of 203211312330 in words is "two hundred three billion, two hundred eleven million, three hundred twelve thousand, three hundred thirty".