231321100120 has 128 divisors (see below), whose sum is σ = 570513715200. Its totient is φ = 83713996800.

The previous prime is 231321100063. The next prime is 231321100121. The reversal of 231321100120 is 21001123132.

It is a junction number, because it is equal to n+sod(n) for n = 231321100094 and 231321100103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321100121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109577865 + ... + 109579975.

It is an arithmetic number, because the mean of its divisors is an integer number (4457138400).

Almost surely, 2^231321100120 is an apocalyptic number.

231321100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231321100120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285256857600).

231321100120 is an abundant number, since it is smaller than the sum of its proper divisors (339192615080).

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

231321100120 is a wasteful number, since it uses less digits than its factorization.

231321100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231321100120 its reverse (21001123132), we get a palindrome (252322223252).

The spelling of 231321100120 in words is "two hundred thirty-one billion, three hundred twenty-one million, one hundred thousand, one hundred twenty".