231020101001 has 4 divisors (see below), whose sum is σ = 231060714900. Its totient is φ = 230979487104.

The previous prime is 231020100989. The next prime is 231020101007. The reversal of 231020101001 is 100101020132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101330805625 + 129689295376 = 318325^2 + 360124^2 .

It is a cyclic number.

It is not a de Polignac number, because 231020101001 - 2³⁰ = 229946359177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231020101007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20298416 + ... + 20309793.

It is an arithmetic number, because the mean of its divisors is an integer number (57765178725).

Almost surely, 2^231020101001 is an apocalyptic number.

It is an amenable number.

231020101001 is a deficient number, since it is larger than the sum of its proper divisors (40613899).

231020101001 is an equidigital number, since it uses as much as digits as its factorization.

231020101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40613898.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 231020101001 its reverse (100101020132), we get a palindrome (331121121133).

The spelling of 231020101001 in words is "two hundred thirty-one billion, twenty million, one hundred one thousand, one".