203102121 has 16 divisors (see below), whose sum is σ = 283843584. Its totient is φ = 128933904.

The previous prime is 203102117. The next prime is 203102129. The reversal of 203102121 is 121201302.

203102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203102121 - 2² = 203102117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203102097 and 203102106.

It is not an unprimeable number, because it can be changed into a prime (203102129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9180 + ... + 22146.

It is an arithmetic number, because the mean of its divisors is an integer number (17740224).

Almost surely, 2^203102121 is an apocalyptic number.

It is an amenable number.

203102121 is a deficient number, since it is larger than the sum of its proper divisors (80741463).

203102121 is a wasteful number, since it uses less digits than its factorization.

203102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 203102121 is about 14251.3901427194. The cubic root of 203102121 is about 587.8116008712.

Adding to 203102121 its reverse (121201302), we get a palindrome (324303423).

The spelling of 203102121 in words is "two hundred three million, one hundred two thousand, one hundred twenty-one".