204044131221 has 16 divisors (see below), whose sum is σ = 311080462464. Its totient is φ = 116538119424.

The previous prime is 204044131211. The next prime is 204044131237. The reversal of 204044131221 is 122131440402.

It is not a de Polignac number, because 204044131221 - 2⁵ = 204044131189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204044131191 and 204044131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204044131211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2395776 + ... + 2479481.

It is an arithmetic number, because the mean of its divisors is an integer number (19442528904).

Almost surely, 2^204044131221 is an apocalyptic number.

204044131221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204044131221 is a deficient number, since it is larger than the sum of its proper divisors (107036331243).

204044131221 is a wasteful number, since it uses less digits than its factorization.

204044131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877260.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 204044131221 its reverse (122131440402), we get a palindrome (326175571623).

The spelling of 204044131221 in words is "two hundred four billion, forty-four million, one hundred thirty-one thousand, two hundred twenty-one".