204131011131 has 24 divisors (see below), whose sum is σ = 304642331136. Its totient is φ = 131631983280.

The previous prime is 204131011127. The next prime is 204131011153. The reversal of 204131011131 is 131110131402.

It is a happy number.

204131011131 is a `hidden beast` number, since 20 + 413 + 101 + 1 + 131 = 666.

It is not a de Polignac number, because 204131011131 - 2² = 204131011127 is a prime.

It is a super-2 number, since 2×204131011131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204131011171) 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, 2520675 + ... + 2600396.

It is an arithmetic number, because the mean of its divisors is an integer number (12693430464).

Almost surely, 2^204131011131 is an apocalyptic number.

204131011131 is a deficient number, since it is larger than the sum of its proper divisors (100511320005).

204131011131 is a wasteful number, since it uses less digits than its factorization.

204131011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121223 (or 5121220 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 204131011131 its reverse (131110131402), we get a palindrome (335241142533).

The spelling of 204131011131 in words is "two hundred four billion, one hundred thirty-one million, eleven thousand, one hundred thirty-one".