204121102 has 4 divisors (see below), whose sum is σ = 306181656. Its totient is φ = 102060550.

The previous prime is 204121079. The next prime is 204121103. The reversal of 204121102 is 201121402.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204121103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51030274 + ... + 51030277.

It is an arithmetic number, because the mean of its divisors is an integer number (76545414).

Almost surely, 2^204121102 is an apocalyptic number.

204121102 is a deficient number, since it is larger than the sum of its proper divisors (102060554).

204121102 is a wasteful number, since it uses less digits than its factorization.

204121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102060553.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 204121102 is about 14287.0956460717. The cubic root of 204121102 is about 588.7929954191.

Adding to 204121102 its reverse (201121402), we get a palindrome (405242504).

The spelling of 204121102 in words is "two hundred four million, one hundred twenty-one thousand, one hundred two".