203220101 has 12 divisors (see below), whose sum is σ = 239641452. Its totient is φ = 171799488.

The previous prime is 203220089. The next prime is 203220109. The reversal of 203220101 is 101022302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170433025 + 32787076 = 13055^2 + 5726^2 .

It is not a de Polignac number, because 203220101 - 2¹⁰ = 203219077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203220109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24830 + ... + 31983.

It is an arithmetic number, because the mean of its divisors is an integer number (19970121).

Almost surely, 2^203220101 is an apocalyptic number.

It is an amenable number.

203220101 is a deficient number, since it is larger than the sum of its proper divisors (36421351).

203220101 is an equidigital number, since it uses as much as digits as its factorization.

203220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56900 (or 56893 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 203220101 is about 14255.5287871057. The cubic root of 203220101 is about 587.9253968087.

Adding to 203220101 its reverse (101022302), we get a palindrome (304242403).

The spelling of 203220101 in words is "two hundred three million, two hundred twenty thousand, one hundred one".