203231421200 has 60 divisors (see below), whose sum is σ = 489854220240. Its totient is φ = 81027722880.

The previous prime is 203231421149. The next prime is 203231421209. The reversal of 203231421200 is 2124132302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (203231421209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704690 + ... + 950289.

It is an arithmetic number, because the mean of its divisors is an integer number (8164237004).

Almost surely, 2^203231421200 is an apocalyptic number.

203231421200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203231421200 is an abundant number, since it is smaller than the sum of its proper divisors (286622799040).

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

203231421200 is a wasteful number, since it uses less digits than its factorization.

203231421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655304 (or 1655293 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203231421200 its reverse (2124132302), we get a palindrome (205355553502).

The spelling of 203231421200 in words is "two hundred three billion, two hundred thirty-one million, four hundred twenty-one thousand, two hundred".