1323231202001 has 2 divisors, whose sum is σ = 1323231202002. Its totient is φ = 1323231202000.

The previous prime is 1323231201997. The next prime is 1323231202067. The reversal of 1323231202001 is 1002021323231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303709523601 + 19521678400 = 1141801^2 + 139720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323231202001 - 2² = 1323231201997 is a prime.

It is a super-2 number, since 2×1323231202001² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1323231205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661615601000 + 661615601001.

It is an arithmetic number, because the mean of its divisors is an integer number (661615601001).

Almost surely, 2^{1323231202001} is an apocalyptic number.

It is an amenable number.

1323231202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323231202001 is an equidigital number, since it uses as much as digits as its factorization.

1323231202001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1323231202001 its reverse (1002021323231), we get a palindrome (2325252525232).

The spelling of 1323231202001 in words is "one trillion, three hundred twenty-three billion, two hundred thirty-one million, two hundred two thousand, one".