2105147111 has 4 divisors (see below), whose sum is σ = 2228979312. Its totient is φ = 1981314912.

The previous prime is 2105147053. The next prime is 2105147117. The reversal of 2105147111 is 1117415012.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2105147111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105147117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61916075 + ... + 61916108.

It is an arithmetic number, because the mean of its divisors is an integer number (557244828).

Almost surely, 2^2105147111 is an apocalyptic number.

2105147111 is a deficient number, since it is larger than the sum of its proper divisors (123832201).

2105147111 is a wasteful number, since it uses less digits than its factorization.

2105147111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123832200.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 2105147111 is about 45881.8821649679. The cubic root of 2105147111 is about 1281.6245467871.

The spelling of 2105147111 in words is "two billion, one hundred five million, one hundred forty-seven thousand, one hundred eleven".