200105121 has 8 divisors (see below), whose sum is σ = 268349760. Its totient is φ = 132631952.

The previous prime is 200105107. The next prime is 200105123. The reversal of 200105121 is 121501002.

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

It is a cyclic number.

It is not a de Polignac number, because 200105121 - 2⁹ = 200104609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200105097 and 200105106.

It is not an unprimeable number, because it can be changed into a prime (200105123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192261 + ... + 193298.

It is an arithmetic number, because the mean of its divisors is an integer number (33543720).

Almost surely, 2^200105121 is an apocalyptic number.

It is an amenable number.

200105121 is a deficient number, since it is larger than the sum of its proper divisors (68244639).

200105121 is a wasteful number, since it uses less digits than its factorization.

200105121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385735.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 200105121 is about 14145.8517240921. The cubic root of 200105121 is about 584.9059882531.

Adding to 200105121 its reverse (121501002), we get a palindrome (321606123).

The spelling of 200105121 in words is "two hundred million, one hundred five thousand, one hundred twenty-one".