2123240205 has 16 divisors (see below), whose sum is σ = 3397832064. Its totient is φ = 1132178880.

The previous prime is 2123240201. The next prime is 2123240233. The reversal of 2123240205 is 5020423212.

It is not a de Polignac number, because 2123240205 - 2² = 2123240201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123240201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96975 + ... + 116835.

It is an arithmetic number, because the mean of its divisors is an integer number (212364504).

Almost surely, 2^2123240205 is an apocalyptic number.

It is an amenable number.

2123240205 is a deficient number, since it is larger than the sum of its proper divisors (1274591859).

2123240205 is a wasteful number, since it uses less digits than its factorization.

2123240205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26996.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2123240205 is about 46078.6306762690. The cubic root of 2123240205 is about 1285.2858009643.

Adding to 2123240205 its reverse (5020423212), we get a palindrome (7143663417).

The spelling of 2123240205 in words is "two billion, one hundred twenty-three million, two hundred forty thousand, two hundred five".