231120001 has 4 divisors (see below), whose sum is σ = 264137152. Its totient is φ = 198102852.

The previous prime is 231119989. The next prime is 231120007. The reversal of 231120001 is 100021132.

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 231120001 - 2⁹ = 231119489 is a prime.

It is a super-3 number, since 3×231120001³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231120001.

It is not an unprimeable number, because it can be changed into a prime (231120007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16508565 + ... + 16508578.

It is an arithmetic number, because the mean of its divisors is an integer number (66034288).

Almost surely, 2^231120001 is an apocalyptic number.

It is an amenable number.

231120001 is a deficient number, since it is larger than the sum of its proper divisors (33017151).

231120001 is an equidigital number, since it uses as much as digits as its factorization.

231120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33017150.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 231120001 is about 15202.6313840730. The cubic root of 231120001 is about 613.6854739469.

Adding to 231120001 its reverse (100021132), we get a palindrome (331141133).

The spelling of 231120001 in words is "two hundred thirty-one million, one hundred twenty thousand, one".