20001100120000 has 280 divisors, whose sum is σ = 52323721362000. Its totient is φ = 7562354688000.

The previous prime is 20001100119983. The next prime is 20001100120033. The reversal of 20001100120000 is 2100110002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 341210694 + ... + 341269306.

Almost surely, 2^{20001100120000} is an apocalyptic number.

20001100120000 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 20001100120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26161860681000).

20001100120000 is an abundant number, since it is smaller than the sum of its proper divisors (32322621242000).

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

20001100120000 is an equidigital number, since it uses as much as digits as its factorization.

20001100120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59113 (or 59088 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20001100120000 its reverse (2100110002), we get a palindrome (20003200230002).

The spelling of 20001100120000 in words is "twenty trillion, one billion, one hundred million, one hundred twenty thousand".