20101011111000 has 320 divisors, whose sum is σ = 70558261488000. Its totient is φ = 5337836582400.

The previous prime is 20101011110993. The next prime is 20101011111001. The reversal of 20101011111000 is 11111010102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101011111001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18839836 + ... + 19878164.

It is an arithmetic number, because the mean of its divisors is an integer number (220494567150).

Almost surely, 2^{20101011111000} is an apocalyptic number.

20101011111000 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 20101011111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35279130744000).

20101011111000 is an abundant number, since it is smaller than the sum of its proper divisors (50457250377000).

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

20101011111000 is a wasteful number, since it uses less digits than its factorization.

20101011111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038601 (or 1038578 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20101011111000 its reverse (11111010102), we get a palindrome (20112122121102).

The spelling of 20101011111000 in words is "twenty trillion, one hundred one billion, eleven million, one hundred eleven thousand".