231120322020 has 576 divisors, whose sum is σ = 875360618496. Its totient is φ = 48159129600.

The previous prime is 231120321997. The next prime is 231120322021. The reversal of 231120322020 is 20223021132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231120321984 and 231120322002.

It is not an unprimeable number, because it can be changed into a prime (231120322021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 101679604 + ... + 101681876.

It is an arithmetic number, because the mean of its divisors is an integer number (1519723296).

Almost surely, 2^231120322020 is an apocalyptic number.

231120322020 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 231120322020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437680309248).

231120322020 is an abundant number, since it is smaller than the sum of its proper divisors (644240296476).

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

231120322020 is a wasteful number, since it uses less digits than its factorization.

231120322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231120322020 its reverse (20223021132), we get a palindrome (251343343152).

The spelling of 231120322020 in words is "two hundred thirty-one billion, one hundred twenty million, three hundred twenty-two thousand, twenty".