205307187122 has 8 divisors (see below), whose sum is σ = 309238626972. Its totient is φ = 102227644800.

The previous prime is 205307187101. The next prime is 205307187139. The reversal of 205307187122 is 221781703502.

It can be written as a sum of positive squares in 2 ways, for example, as 179624240041 + 25682947081 = 423821^2 + 160259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212973779 + ... + 212974742.

Almost surely, 2^205307187122 is an apocalyptic number.

205307187122 is a deficient number, since it is larger than the sum of its proper divisors (103931439850).

205307187122 is a wasteful number, since it uses less digits than its factorization.

205307187122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425948764.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 205307187122 in words is "two hundred five billion, three hundred seven million, one hundred eighty-seven thousand, one hundred twenty-two".