204311043111 has 16 divisors (see below), whose sum is σ = 311340340224. Its totient is φ = 116745707424.

The previous prime is 204311043109. The next prime is 204311043127. The reversal of 204311043111 is 111340113402.

It is not a de Polignac number, because 204311043111 - 2¹ = 204311043109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204311043161) 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, 694825 + ... + 944141.

It is an arithmetic number, because the mean of its divisors is an integer number (19458771264).

Almost surely, 2^204311043111 is an apocalyptic number.

204311043111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

204311043111 is a deficient number, since it is larger than the sum of its proper divisors (107029297113).

204311043111 is a wasteful number, since it uses less digits than its factorization.

204311043111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288350.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 204311043111 its reverse (111340113402), we get a palindrome (315651156513).

The spelling of 204311043111 in words is "two hundred four billion, three hundred eleven million, forty-three thousand, one hundred eleven".