231020120 has 32 divisors (see below), whose sum is σ = 520391520. Its totient is φ = 92302080.

The previous prime is 231020113. The next prime is 231020129. The reversal of 231020120 is 21020132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231020129) 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 7 ways as a sum of consecutive naturals, for example, 38525 + ... + 44115.

It is an arithmetic number, because the mean of its divisors is an integer number (16262235).

Almost surely, 2^231020120 is an apocalyptic number.

231020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231020120 is an abundant number, since it is smaller than the sum of its proper divisors (289371400).

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

231020120 is a wasteful number, since it uses less digits than its factorization.

231020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6635 (or 6631 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 231020120 is about 15199.3460385636. The cubic root of 231020120 is about 613.5970576112.

Adding to 231020120 its reverse (21020132), we get a palindrome (252040252).

The spelling of 231020120 in words is "two hundred thirty-one million, twenty thousand, one hundred twenty".