204221140400421 has 24 divisors (see below), whose sum is σ = 295410750388416. Its totient is φ = 135951547481280.

The previous prime is 204221140400419. The next prime is 204221140400447. The reversal of 204221140400421 is 124004041122402.

204221140400421 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 211 + 4 + 0 + 400 + 42 + 1 = 666.

It is not a de Polignac number, because 204221140400421 - 2¹ = 204221140400419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204221140400461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16108321 + ... + 25844153.

It is an arithmetic number, because the mean of its divisors is an integer number (12308781266184).

Almost surely, 2^{204221140400421} is an apocalyptic number.

It is an amenable number.

204221140400421 is a deficient number, since it is larger than the sum of its proper divisors (91189609987995).

204221140400421 is a wasteful number, since it uses less digits than its factorization.

204221140400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739193 (or 9739190 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 204221140400421 its reverse (124004041122402), we get a palindrome (328225181522823).

The spelling of 204221140400421 in words is "two hundred four trillion, two hundred twenty-one billion, one hundred forty million, four hundred thousand, four hundred twenty-one".