20111121102000 has 320 divisors, whose sum is σ = 70452445040640. Its totient is φ = 4916809728000.

The previous prime is 20111121101983. The next prime is 20111121102001. The reversal of 20111121102000 is 20112111102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20111121102001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 688624 + ... + 6379376.

It is an arithmetic number, because the mean of its divisors is an integer number (220163890752).

Almost surely, 2^{20111121102000} is an apocalyptic number.

20111121102000 is a gapful number since it is divisible by the number (20) 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 20111121102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35226222520320).

20111121102000 is an abundant number, since it is smaller than the sum of its proper divisors (50341323938640).

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

20111121102000 is a wasteful number, since it uses less digits than its factorization.

20111121102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690829 (or 5690813 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111121102000 its reverse (20112111102), we get a palindrome (20131233213102).

The spelling of 20111121102000 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, one hundred two thousand".