204351021129 has 16 divisors (see below), whose sum is σ = 275029058304. Its totient is φ = 134957144400.

The previous prime is 204351021107. The next prime is 204351021131. The reversal of 204351021129 is 921120153402.

It is not a de Polignac number, because 204351021129 - 2⁷ = 204351021001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204351021096 and 204351021105.

It is not an unprimeable number, because it can be changed into a prime (204351021139) 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, 230919 + ... + 679724.

It is an arithmetic number, because the mean of its divisors is an integer number (17189316144).

Almost surely, 2^204351021129 is an apocalyptic number.

It is an amenable number.

204351021129 is a deficient number, since it is larger than the sum of its proper divisors (70678037175).

204351021129 is a wasteful number, since it uses less digits than its factorization.

204351021129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911348.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 204351021129 in words is "two hundred four billion, three hundred fifty-one million, twenty-one thousand, one hundred twenty-nine".