12100000000 has 243 divisors, whose sum is σ = 33185041603. Its totient is φ = 4400000000.

The previous prime is 12099999983. The next prime is 12100000051. The reversal of 12100000000 is 121.

The square root of 12100000000 is 110000.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8602933504 + 3497066496 = 92752^2 + 59136^2 .

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1099999995 + ... + 1100000005.

Almost surely, 2^12100000000 is an apocalyptic number.

12100000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12100000000 is the 110000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12100000000

12100000000 is an abundant number, since it is smaller than the sum of its proper divisors (21085041603).

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

12100000000 is an frugal number, since it uses more digits than its factorization.

12100000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

Adding to 12100000000 its reverse (121), we get a palindrome (12100000121).

Multiplying 12100000000 by its reverse (121), we get a 4-th power (1464100000000 = 1100⁴).

12100000000 divided by its reverse (121) gives a 8-th power (100000000 = 10⁸).

The spelling of 12100000000 in words is "twelve billion, one hundred million", and thus it is an aban number.