2115100000000 has 324 divisors, whose sum is σ = 5686868182072. Its totient is φ = 780480000000.

The previous prime is 2115099999997. The next prime is 2115100000001. The reversal of 2115100000000 is 15112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115100000001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1299999187 + ... + 1300000813.

Almost surely, 2^{2115100000000} is an apocalyptic number.

2115100000000 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 2115100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2843434091036).

2115100000000 is an abundant number, since it is smaller than the sum of its proper divisors (3571768182072).

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

2115100000000 is an frugal number, since it uses more digits than its factorization.

2115100000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

Adding to 2115100000000 its reverse (15112), we get a palindrome (2115100015112).

The spelling of 2115100000000 in words is "two trillion, one hundred fifteen billion, one hundred million", and thus it is an aban number.