231001120 has 48 divisors (see below), whose sum is σ = 623706048. Its totient is φ = 79200000.

The previous prime is 231001097. The next prime is 231001139. The reversal of 231001120 is 21100132.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 231001097 and 231001106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102006 + ... + 104245.

It is an arithmetic number, because the mean of its divisors is an integer number (12993876).

Almost surely, 2^231001120 is an apocalyptic number.

231001120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231001120 is an abundant number, since it is smaller than the sum of its proper divisors (392704928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231001120 is a wasteful number, since it uses less digits than its factorization.

231001120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206273 (or 206265 counting only the distinct ones).

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

The square root of 231001120 is about 15198.7209988209. The cubic root of 231001120 is about 613.5802356078.

Adding to 231001120 its reverse (21100132), we get a palindrome (252101252).

The spelling of 231001120 in words is "two hundred thirty-one million, one thousand, one hundred twenty".