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2100000000000 = 21135117
BaseRepresentation
bin11110100011110001110…
…000010000100000000000
321102202110121111012012210
4132203301300100200000
5233401300000000000
64244420544022120
7304501646323410
oct36436160204000
97382417435183
102100000000000
1173a672286991
1229abb1901940
1312304c073ac6
14738d7910640
153995c217350
hex1e8f1c10800

2100000000000 has 576 divisors, whose sum is σ = 7998046842240. Its totient is φ = 480000000000.

The previous prime is 2099999999983. The next prime is 2100000000011. The reversal of 2100000000000 is 12.

It is a Harshad number since it is a multiple of its sum of digits (3).

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

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299999999997 + ... + 300000000003.

It is an arithmetic number, because the mean of its divisors is an integer number (13885497990).

Almost surely, 22100000000000 is an apocalyptic number.

2100000000000 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 2100000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3999023421120).

2100000000000 is an abundant number, since it is smaller than the sum of its proper divisors (5898046842240).

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

2100000000000 is an frugal number, since it uses more digits than its factorization.

2100000000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

Adding to 2100000000000 its reverse (12), we get a palindrome (2100000000012).

The spelling of 2100000000000 in words is "two trillion, one hundred billion", and thus it is an aban number.