1231022331018 has 24 divisors (see below), whose sum is σ = 2667394173600. Its totient is φ = 410313219624.

The previous prime is 1231022331017. The next prime is 1231022331031. The reversal of 1231022331018 is 8101332201321.

1231022331018 is a `hidden beast` number, since 1 + 2 + 310 + 2 + 2 + 331 + 0 + 18 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1231022330982 and 1231022331000.

It is not an unprimeable number, because it can be changed into a prime (1231022331017) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2020078 + ... + 2557881.

It is an arithmetic number, because the mean of its divisors is an integer number (111141423900).

Almost surely, 2^{1231022331018} is an apocalyptic number.

1231022331018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1231022331018 is an abundant number, since it is smaller than the sum of its proper divisors (1436371842582).

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

1231022331018 is a wasteful number, since it uses less digits than its factorization.

1231022331018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592906 (or 4592903 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 1231022331018 its reverse (8101332201321), we get a palindrome (9332354532339).

The spelling of 1231022331018 in words is "one trillion, two hundred thirty-one billion, twenty-two million, three hundred thirty-one thousand, eighteen".