1231322240412 has 72 divisors (see below), whose sum is σ = 3395863576560. Its totient is φ = 373084081920.

The previous prime is 1231322240399. The next prime is 1231322240431. The reversal of 1231322240412 is 2140422231321.

1231322240412 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 3 + 2 + 2 + 240 + 412 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 3271914 + ... + 3628782.

Almost surely, 2^{1231322240412} is an apocalyptic number.

1231322240412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231322240412 is an abundant number, since it is smaller than the sum of its proper divisors (2164541336148).

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

1231322240412 is a wasteful number, since it uses less digits than its factorization.

1231322240412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365603 (or 365598 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1231322240412 its reverse (2140422231321), we get a palindrome (3371744471733).

Subtracting 1231322240412 from its reverse (2140422231321), we obtain a palindrome (909099990909).

The spelling of 1231322240412 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-two million, two hundred forty thousand, four hundred twelve".