203003221220201 has 4 divisors (see below), whose sum is σ = 203003466634452. Its totient is φ = 203002975805952.

The previous prime is 203003221220197. The next prime is 203003221220209. The reversal of 203003221220201 is 102022122300302.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59841039018601 + 143162182201600 = 7735699^2 + 11965040^2 .

It is a cyclic number.

It is not a de Polignac number, because 203003221220201 - 2² = 203003221220197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203003221220209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121462136 + ... + 123122121.

It is an arithmetic number, because the mean of its divisors is an integer number (50750866658613).

Almost surely, 2^{203003221220201} is an apocalyptic number.

It is an amenable number.

203003221220201 is a deficient number, since it is larger than the sum of its proper divisors (245414251).

203003221220201 is an equidigital number, since it uses as much as digits as its factorization.

203003221220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245414250.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203003221220201 its reverse (102022122300302), we get a palindrome (305025343520503).

The spelling of 203003221220201 in words is "two hundred three trillion, three billion, two hundred twenty-one million, two hundred twenty thousand, two hundred one".