2131100000000 has 324 divisors, whose sum is σ = 5395438643784. Its totient is φ = 840000000000.

The previous prime is 2131099999979. The next prime is 2131100000009. The reversal of 2131100000000 is 11312.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131100000009) 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, 10099999895 + ... + 10100000105.

Almost surely, 2^{2131100000000} is an apocalyptic number.

2131100000000 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 2131100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697719321892).

2131100000000 is an abundant number, since it is smaller than the sum of its proper divisors (3264338643784).

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

2131100000000 is an frugal number, since it uses more digits than its factorization.

2131100000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 2131100000000 its reverse (11312), we get a palindrome (2131100011312).

The spelling of 2131100000000 in words is "two trillion, one hundred thirty-one billion, one hundred million", and thus it is an aban number.