12031987123640 has 128 divisors (see below), whose sum is σ = 29813655225600. Its totient is φ = 4333888634880.

The previous prime is 12031987123631. The next prime is 12031987123649. The reversal of 12031987123640 is 4632178913021.

It is an interprime number because it is at equal distance from previous prime (12031987123631) and next prime (12031987123649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031987123649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19944107 + ... + 20538533.

It is an arithmetic number, because the mean of its divisors is an integer number (232919181450).

Almost surely, 2^{12031987123640} is an apocalyptic number.

12031987123640 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 12031987123640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14906827612800).

12031987123640 is an abundant number, since it is smaller than the sum of its proper divisors (17781668101960).

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

12031987123640 is a wasteful number, since it uses less digits than its factorization.

12031987123640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594885 (or 594881 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 12031987123640 in words is "twelve trillion, thirty-one billion, nine hundred eighty-seven million, one hundred twenty-three thousand, six hundred forty".