203231122001 has 2 divisors, whose sum is σ = 203231122002. Its totient is φ = 203231122000.

The previous prime is 203231121991. The next prime is 203231122007. The reversal of 203231122001 is 100221132302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193798050625 + 9433071376 = 440225^2 + 97124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203231122001 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (203231122007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101615561000 + 101615561001.

It is an arithmetic number, because the mean of its divisors is an integer number (101615561001).

Almost surely, 2^203231122001 is an apocalyptic number.

It is an amenable number.

203231122001 is a deficient number, since it is larger than the sum of its proper divisors (1).

203231122001 is an equidigital number, since it uses as much as digits as its factorization.

203231122001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203231122001 its reverse (100221132302), we get a palindrome (303452254303).

The spelling of 203231122001 in words is "two hundred three billion, two hundred thirty-one million, one hundred twenty-two thousand, one".