1111531821312 has 288 divisors, whose sum is σ = 3338429552640. Its totient is φ = 325353922560.

The previous prime is 1111531821287. The next prime is 1111531821313. The reversal of 1111531821312 is 2131281351111.

It is a self number, because there is not a number n which added to its sum of digits gives 1111531821312.

It is not an unprimeable number, because it can be changed into a prime (1111531821313) 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, 43435273 + ... + 43460855.

It is an arithmetic number, because the mean of its divisors is an integer number (11591769280).

Almost surely, 2^{1111531821312} is an apocalyptic number.

1111531821312 is a gapful number since it is divisible by the number (12) 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 1111531821312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669214776320).

1111531821312 is an abundant number, since it is smaller than the sum of its proper divisors (2226897731328).

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

1111531821312 is a wasteful number, since it uses less digits than its factorization.

1111531821312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25789 (or 25775 counting only the distinct ones).

The product of its digits is 1440, while the sum is 30.

The spelling of 1111531821312 in words is "one trillion, one hundred eleven billion, five hundred thirty-one million, eight hundred twenty-one thousand, three hundred twelve".