203312002001 has 4 divisors (see below), whose sum is σ = 208806921012. Its totient is φ = 197817082992.

The previous prime is 203312001967. The next prime is 203312002021. The reversal of 203312002001 is 100200213302.

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 172018392001 + 31293610000 = 414751^2 + 176900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203312002001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203312002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747459450 + ... + 2747459523.

It is an arithmetic number, because the mean of its divisors is an integer number (52201730253).

Almost surely, 2^203312002001 is an apocalyptic number.

It is an amenable number.

203312002001 is a deficient number, since it is larger than the sum of its proper divisors (5494919011).

203312002001 is an equidigital number, since it uses as much as digits as its factorization.

203312002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494919010.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 203312002001 its reverse (100200213302), we get a palindrome (303512215303).

The spelling of 203312002001 in words is "two hundred three billion, three hundred twelve million, two thousand, one".