1021109040000 has 1440 divisors, whose sum is σ = 4328046019440. Its totient is φ = 230307840000.

The previous prime is 1021109039971. The next prime is 1021109040031. The reversal of 1021109040000 is 409011201.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 3633839860 + ... + 3633840140.

Almost surely, 2^{1021109040000} is an apocalyptic number.

1021109040000 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 1021109040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2164023009720).

1021109040000 is an abundant number, since it is smaller than the sum of its proper divisors (3306936979440).

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

1021109040000 is a wasteful number, since it uses less digits than its factorization.

1021109040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 1021109040000 in words is "one trillion, twenty-one billion, one hundred nine million, forty thousand".