231121322320 has 120 divisors (see below), whose sum is σ = 628232112000. Its totient is φ = 78843131136.

The previous prime is 231121322291. The next prime is 231121322363. The reversal of 231121322320 is 23223121132.

It is a junction number, because it is equal to n+sod(n) for n = 231121322291 and 231121322300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 631941 + ... + 928219.

It is an arithmetic number, because the mean of its divisors is an integer number (5235267600).

Almost surely, 2^231121322320 is an apocalyptic number.

231121322320 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 231121322320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314116056000).

231121322320 is an abundant number, since it is smaller than the sum of its proper divisors (397110789680).

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

231121322320 is a wasteful number, since it uses less digits than its factorization.

231121322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296505 (or 296492 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231121322320 its reverse (23223121132), we get a palindrome (254344443452).

The spelling of 231121322320 in words is "two hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, three hundred twenty".