204311131121423 has 24 divisors (see below), whose sum is σ = 212895778632480. Its totient is φ = 196000770580160.

The previous prime is 204311131121381. The next prime is 204311131121431. The reversal of 204311131121423 is 324121131113402.

It is not a de Polignac number, because 204311131121423 - 2⁴⁰ = 203211619493647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204311131121023) 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, 119860073 + ... + 121552701.

It is an arithmetic number, because the mean of its divisors is an integer number (8870657443020).

Almost surely, 2^{204311131121423} is an apocalyptic number.

204311131121423 is a deficient number, since it is larger than the sum of its proper divisors (8584647511057).

204311131121423 is a wasteful number, since it uses less digits than its factorization.

204311131121423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693807 (or 1693760 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 204311131121423 its reverse (324121131113402), we get a palindrome (528432262234825).

The spelling of 204311131121423 in words is "two hundred four trillion, three hundred eleven billion, one hundred thirty-one million, one hundred twenty-one thousand, four hundred twenty-three".