2131100111 has 6 divisors (see below), whose sum is σ = 2479034880. Its totient is φ = 1826657196.

The previous prime is 2131100089. The next prime is 2131100113. The reversal of 2131100111 is 1110011312.

It is a happy number.

It is not a de Polignac number, because 2131100111 - 2¹⁴ = 2131083727 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2131100092 and 2131100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131100113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21745871 + ... + 21745968.

It is an arithmetic number, because the mean of its divisors is an integer number (413172480).

Almost surely, 2^2131100111 is an apocalyptic number.

2131100111 is a deficient number, since it is larger than the sum of its proper divisors (347934769).

2131100111 is an equidigital number, since it uses as much as digits as its factorization.

2131100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43491853 (or 43491846 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 2131100111 is about 46163.8398641188. The cubic root of 2131100111 is about 1286.8698242108.

Adding to 2131100111 its reverse (1110011312), we get a palindrome (3241111423).

The spelling of 2131100111 in words is "two billion, one hundred thirty-one million, one hundred thousand, one hundred eleven".