205400421112 has 8 divisors (see below), whose sum is σ = 385125789600. Its totient is φ = 102700210552.

The previous prime is 205400421073. The next prime is 205400421113. The reversal of 205400421112 is 211124004502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205400421113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12837526312 + ... + 12837526327.

It is an arithmetic number, because the mean of its divisors is an integer number (48140723700).

Almost surely, 2^205400421112 is an apocalyptic number.

It is an amenable number.

205400421112 is a deficient number, since it is larger than the sum of its proper divisors (179725368488).

205400421112 is a wasteful number, since it uses less digits than its factorization.

205400421112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25675052645 (or 25675052641 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 205400421112 its reverse (211124004502), we get a palindrome (416524425614).

The spelling of 205400421112 in words is "two hundred five billion, four hundred million, four hundred twenty-one thousand, one hundred twelve".