1031213919568 has 80 divisors (see below), whose sum is σ = 2331123120000. Its totient is φ = 441736232448.

The previous prime is 1031213919563. The next prime is 1031213919611. The reversal of 1031213919568 is 8659193121301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031213919563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11639823 + ... + 11728081.

It is an arithmetic number, because the mean of its divisors is an integer number (29139039000).

Almost surely, 2^{1031213919568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031213919568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165561560000).

1031213919568 is an abundant number, since it is smaller than the sum of its proper divisors (1299909200432).

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

1031213919568 is an equidigital number, since it uses as much as digits as its factorization.

1031213919568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90417 (or 90397 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 1031213919568 in words is "one trillion, thirty-one billion, two hundred thirteen million, nine hundred nineteen thousand, five hundred sixty-eight".