1205131943205 has 16 divisors (see below), whose sum is σ = 2142456788160. Its totient is φ = 642737036304.

The previous prime is 1205131943159. The next prime is 1205131943227. The reversal of 1205131943205 is 5023491315021.

It is a happy number.

1205131943205 is a `hidden beast` number, since 1 + 20 + 513 + 1 + 94 + 32 + 0 + 5 = 666.

It is not a de Polignac number, because 1205131943205 - 2¹⁰ = 1205131942181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205131943205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4463451507 + ... + 4463451776.

It is an arithmetic number, because the mean of its divisors is an integer number (133903549260).

Almost surely, 2^{1205131943205} is an apocalyptic number.

1205131943205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205131943205 is a deficient number, since it is larger than the sum of its proper divisors (937324844955).

1205131943205 is an equidigital number, since it uses as much as digits as its factorization.

1205131943205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926903297 (or 8926903291 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 1205131943205 in words is "one trillion, two hundred five billion, one hundred thirty-one million, nine hundred forty-three thousand, two hundred five".