203201320344021 has 12 divisors (see below), whose sum is σ = 293513385300460. Its totient is φ = 135467377499520.

The previous prime is 203201320343999. The next prime is 203201320344053. The reversal of 203201320344021 is 120443023102302.

203201320344021 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 0 + 13 + 203 + 440 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35862000503121 + 167339319840900 = 5988489^2 + 12935970^2 .

It is not a de Polignac number, because 203201320344021 - 2¹³ = 203201320335829 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 (203201320346021) 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, 6290836 + ... + 21118173.

Almost surely, 2^{203201320344021} is an apocalyptic number.

It is an amenable number.

203201320344021 is a deficient number, since it is larger than the sum of its proper divisors (90312064956439).

203201320344021 is a wasteful number, since it uses less digits than its factorization.

203201320344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28232756 (or 28232753 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 203201320344021 its reverse (120443023102302), we get a palindrome (323644343446323).

The spelling of 203201320344021 in words is "two hundred three trillion, two hundred one billion, three hundred twenty million, three hundred forty-four thousand, twenty-one".