205200122 has 4 divisors (see below), whose sum is σ = 307800186. Its totient is φ = 102600060.

The previous prime is 205200119. The next prime is 205200131. The reversal of 205200122 is 221002502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 183846481 + 21353641 = 13559^2 + 4621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205200097 and 205200106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51300029 + ... + 51300032.

Almost surely, 2^205200122 is an apocalyptic number.

205200122 is a deficient number, since it is larger than the sum of its proper divisors (102600064).

205200122 is a wasteful number, since it uses less digits than its factorization.

205200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102600063.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 205200122 is about 14324.8079219234. The cubic root of 205200122 is about 589.8286603875.

Adding to 205200122 its reverse (221002502), we get a palindrome (426202624).

The spelling of 205200122 in words is "two hundred five million, two hundred thousand, one hundred twenty-two".