205121102 has 8 divisors (see below), whose sum is σ = 310728312. Its totient is φ = 101545000.

The previous prime is 205121057. The next prime is 205121117. The reversal of 205121102 is 201121502.

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

It is a congruent number.

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, 507524 + ... + 507927.

It is an arithmetic number, because the mean of its divisors is an integer number (38841039).

Almost surely, 2^205121102 is an apocalyptic number.

205121102 is a deficient number, since it is larger than the sum of its proper divisors (105607210).

205121102 is a wasteful number, since it uses less digits than its factorization.

205121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015554.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 205121102 is about 14322.0495041736. The cubic root of 205121102 is about 589.7529387873.

Adding to 205121102 its reverse (201121502), we get a palindrome (406242604).

The spelling of 205121102 in words is "two hundred five million, one hundred twenty-one thousand, one hundred two".