204221100130400 has 72 divisors (see below), whose sum is σ = 503490946641984. Its totient is φ = 80879643584000.

The previous prime is 204221100130339. The next prime is 204221100130429. The reversal of 204221100130400 is 4031001122402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1263663632 + ... + 1263825231.

It is an arithmetic number, because the mean of its divisors is an integer number (6992929814472).

Almost surely, 2^{204221100130400} is an apocalyptic number.

204221100130400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204221100130400 is an abundant number, since it is smaller than the sum of its proper divisors (299269846511584).

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

204221100130400 is a wasteful number, since it uses less digits than its factorization.

204221100130400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527488984 (or 2527488971 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 204221100130400 its reverse (4031001122402), we get a palindrome (208252101252802).

The spelling of 204221100130400 in words is "two hundred four trillion, two hundred twenty-one billion, one hundred million, one hundred thirty thousand, four hundred".