204000120010421 has 32 divisors (see below), whose sum is σ = 242892251078400. Its totient is φ = 167690759109120.

The previous prime is 204000120010411. The next prime is 204000120010447. The reversal of 204000120010421 is 124010021000402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204000120010421 is a prime.

It is a super-2 number, since 2×204000120010421² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204000120010421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204000120010411) 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, 282301715 + ... + 283023423.

It is an arithmetic number, because the mean of its divisors is an integer number (7590382846200).

Almost surely, 2^{204000120010421} is an apocalyptic number.

It is an amenable number.

204000120010421 is a deficient number, since it is larger than the sum of its proper divisors (38892131067979).

204000120010421 is a wasteful number, since it uses less digits than its factorization.

204000120010421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738509.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 204000120010421 its reverse (124010021000402), we get a palindrome (328010141010823).

The spelling of 204000120010421 in words is "two hundred four trillion, one hundred twenty million, ten thousand, four hundred twenty-one".