203421331212 has 96 divisors (see below), whose sum is σ = 526386470400. Its totient is φ = 60624883200.

The previous prime is 203421331199. The next prime is 203421331213. The reversal of 203421331212 is 212133124302.

It is not an unprimeable number, because it can be changed into a prime (203421331213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3806614 + ... + 3859682.

It is an arithmetic number, because the mean of its divisors is an integer number (5483192400).

Almost surely, 2^203421331212 is an apocalyptic number.

203421331212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203421331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263193235200).

203421331212 is an abundant number, since it is smaller than the sum of its proper divisors (322965139188).

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

203421331212 is a wasteful number, since it uses less digits than its factorization.

203421331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53567 (or 53565 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 203421331212 its reverse (212133124302), we get a palindrome (415554455514).

The spelling of 203421331212 in words is "two hundred three billion, four hundred twenty-one million, three hundred thirty-one thousand, two hundred twelve".