231020031001 has 2 divisors, whose sum is σ = 231020031002. Its totient is φ = 231020031000.

The previous prime is 231020030909. The next prime is 231020031031. The reversal of 231020031001 is 100130020132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198412339225 + 32607691776 = 445435^2 + 180576^2 .

It is a cyclic number.

It is not a de Polignac number, because 231020031001 - 2¹³ = 231020022809 is a prime.

It is not a weakly prime, because it can be changed into another prime (231020031031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510015500 + 115510015501.

It is an arithmetic number, because the mean of its divisors is an integer number (115510015501).

Almost surely, 2^231020031001 is an apocalyptic number.

It is an amenable number.

231020031001 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020031001 is an equidigital number, since it uses as much as digits as its factorization.

231020031001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 231020031001 its reverse (100130020132), we get a palindrome (331150051133).

The spelling of 231020031001 in words is "two hundred thirty-one billion, twenty million, thirty-one thousand, one".