12331123020 has 96 divisors (see below), whose sum is σ = 38593497600. Its totient is φ = 3268585152.

The previous prime is 12331122983. The next prime is 12331123033. The reversal of 12331123020 is 2032113321.

12331123020 is a `hidden beast` number, since 123 + 311 + 230 + 2 + 0 = 666.

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 = 12331122984 and 12331123002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21811 + ... + 158549.

It is an arithmetic number, because the mean of its divisors is an integer number (402015600).

Almost surely, 2^12331123020 is an apocalyptic number.

12331123020 is a gapful number since it is divisible by the number (10) 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 12331123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19296748800).

12331123020 is an abundant number, since it is smaller than the sum of its proper divisors (26262374580).

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

12331123020 is a wasteful number, since it uses less digits than its factorization.

12331123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136924 (or 136916 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12331123020 its reverse (2032113321), we get a palindrome (14363236341).

The spelling of 12331123020 in words is "twelve billion, three hundred thirty-one million, one hundred twenty-three thousand, twenty".