1231202331001 has 2 divisors, whose sum is σ = 1231202331002. Its totient is φ = 1231202331000.

The previous prime is 1231202330983. The next prime is 1231202331011. The reversal of 1231202331001 is 1001332021321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024500254976 + 206702076025 = 1012176^2 + 454645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231202331001 - 2⁷ = 1231202330873 is a prime.

It is a super-3 number, since 3×1231202331001³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231202331001.

It is not a weakly prime, because it can be changed into another prime (1231202331011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615601165500 + 615601165501.

It is an arithmetic number, because the mean of its divisors is an integer number (615601165501).

Almost surely, 2^{1231202331001} is an apocalyptic number.

It is an amenable number.

1231202331001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231202331001 is an equidigital number, since it uses as much as digits as its factorization.

1231202331001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1231202331001 its reverse (1001332021321), we get a palindrome (2232534352322).

The spelling of 1231202331001 in words is "one trillion, two hundred thirty-one billion, two hundred two million, three hundred thirty-one thousand, one".