231120222320 has 120 divisors (see below), whose sum is σ = 584922062592. Its totient is φ = 84888960000.

The previous prime is 231120222317. The next prime is 231120222323. The reversal of 231120222320 is 23222021132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231120222317) and next prime (231120222323).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231120222292 and 231120222301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231120222323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2537570 + ... + 2627070.

Almost surely, 2^231120222320 is an apocalyptic number.

231120222320 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 231120222320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292461031296).

231120222320 is an abundant number, since it is smaller than the sum of its proper divisors (353801840272).

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

231120222320 is a wasteful number, since it uses less digits than its factorization.

231120222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89731 (or 89712 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231120222320 its reverse (23222021132), we get a palindrome (254342243452).

The spelling of 231120222320 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred twenty-two thousand, three hundred twenty".