109921101990000 has 400 divisors, whose sum is σ = 407453512139520. Its totient is φ = 25005738240000.

The previous prime is 109921101989999. The next prime is 109921101990023. The reversal of 109921101990000 is 99101129901.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 43069636 + ... + 45550364.

Almost surely, 2^{109921101990000} is an apocalyptic number.

109921101990000 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 109921101990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203726756069760).

109921101990000 is an abundant number, since it is smaller than the sum of its proper divisors (297532410149520).

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

109921101990000 is a wasteful number, since it uses less digits than its factorization.

109921101990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480978 (or 2480957 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 109921101990000 in words is "one hundred nine trillion, nine hundred twenty-one billion, one hundred one million, nine hundred ninety thousand".