20120102100000 has 432 divisors, whose sum is σ = 81732709146816. Its totient is φ = 4598879040000.

The previous prime is 20120102099987. The next prime is 20120102100029. The reversal of 20120102100000 is 120102102.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4703167 + ... + 7896833.

It is an arithmetic number, because the mean of its divisors is an integer number (189196085988).

Almost surely, 2^{20120102100000} is an apocalyptic number.

20120102100000 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 20120102100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40866354573408).

20120102100000 is an abundant number, since it is smaller than the sum of its proper divisors (61612607046816).

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

20120102100000 is an equidigital number, since it uses as much as digits as its factorization.

20120102100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193715 (or 3193684 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20120102100000 its reverse (120102102), we get a palindrome (20120222202102).

The spelling of 20120102100000 in words is "twenty trillion, one hundred twenty billion, one hundred two million, one hundred thousand".