231021230001 has 4 divisors (see below), whose sum is σ = 308028306672. Its totient is φ = 154014153332.

The previous prime is 231021229997. The next prime is 231021230021. The reversal of 231021230001 is 100032120132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231021230001 - 2² = 231021229997 is a prime.

It is a super-2 number, since 2×231021230001² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231021230021) 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, 38503538331 + ... + 38503538336.

It is an arithmetic number, because the mean of its divisors is an integer number (77007076668).

Almost surely, 2^231021230001 is an apocalyptic number.

It is an amenable number.

231021230001 is a deficient number, since it is larger than the sum of its proper divisors (77007076671).

231021230001 is an equidigital number, since it uses as much as digits as its factorization.

231021230001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77007076670.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 231021230001 its reverse (100032120132), we get a palindrome (331053350133).

The spelling of 231021230001 in words is "two hundred thirty-one billion, twenty-one million, two hundred thirty thousand, one".