203123331001 has 2 divisors, whose sum is σ = 203123331002. Its totient is φ = 203123331000.

The previous prime is 203123330929. The next prime is 203123331107. The reversal of 203123331001 is 100133321302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183547123776 + 19576207225 = 428424^2 + 139915^2 .

It is a cyclic number.

It is not a de Polignac number, because 203123331001 - 2²⁵ = 203089776569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203123331001.

It is not a weakly prime, because it can be changed into another prime (203123331401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561665500 + 101561665501.

It is an arithmetic number, because the mean of its divisors is an integer number (101561665501).

Almost surely, 2^203123331001 is an apocalyptic number.

It is an amenable number.

203123331001 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123331001 is an equidigital number, since it uses as much as digits as its factorization.

203123331001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 203123331001 its reverse (100133321302), we get a palindrome (303256652303).

The spelling of 203123331001 in words is "two hundred three billion, one hundred twenty-three million, three hundred thirty-one thousand, one".