2143212105 has 32 divisors (see below), whose sum is σ = 3588194304. Its totient is φ = 1090305216.

The previous prime is 2143212089. The next prime is 2143212107. The reversal of 2143212105 is 5012123412.

It is not a de Polignac number, because 2143212105 - 2⁴ = 2143212089 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2143212107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118152 + ... + 135078.

It is an arithmetic number, because the mean of its divisors is an integer number (112131072).

Almost surely, 2^2143212105 is an apocalyptic number.

It is an amenable number.

2143212105 is a deficient number, since it is larger than the sum of its proper divisors (1444982199).

2143212105 is a wasteful number, since it uses less digits than its factorization.

2143212105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17325.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2143212105 is about 46294.8388592076. The cubic root of 2143212105 is about 1289.3031721223.

Adding to 2143212105 its reverse (5012123412), we get a palindrome (7155335517).

The spelling of 2143212105 in words is "two billion, one hundred forty-three million, two hundred twelve thousand, one hundred five".