203220121 has 8 divisors (see below), whose sum is σ = 219021824. Its totient is φ = 187442640.

The previous prime is 203220119. The next prime is 203220163. The reversal of 203220121 is 121022302.

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 203220121 - 2¹ = 203220119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13810 + ... + 24436.

It is an arithmetic number, because the mean of its divisors is an integer number (27377728).

Almost surely, 2^203220121 is an apocalyptic number.

It is an amenable number.

203220121 is a deficient number, since it is larger than the sum of its proper divisors (15801703).

203220121 is a wasteful number, since it uses less digits than its factorization.

203220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 203220121 is about 14255.5294885879. The cubic root of 203220121 is about 587.9254160956.

Adding to 203220121 its reverse (121022302), we get a palindrome (324242423).

The spelling of 203220121 in words is "two hundred three million, two hundred twenty thousand, one hundred twenty-one".