331123111020 has 144 divisors (see below), whose sum is σ = 1145296545120. Its totient is φ = 76712675328.

The previous prime is 331123111009. The next prime is 331123111043. The reversal of 331123111020 is 20111321133.

331123111020 is a `hidden beast` number, since 331 + 1 + 2 + 311 + 1 + 0 + 20 = 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 = 331123110984 and 331123111002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4122150 + ... + 4201709.

It is an arithmetic number, because the mean of its divisors is an integer number (7953448230).

Almost surely, 2^331123111020 is an apocalyptic number.

331123111020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331123111020 is an abundant number, since it is smaller than the sum of its proper divisors (814173434100).

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

331123111020 is a wasteful number, since it uses less digits than its factorization.

331123111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323904 (or 8323899 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 331123111020 its reverse (20111321133), we get a palindrome (351234432153).

The spelling of 331123111020 in words is "three hundred thirty-one billion, one hundred twenty-three million, one hundred eleven thousand, twenty".