2101431205 has 16 divisors (see below), whose sum is σ = 2641708800. Its totient is φ = 1602619200.

The previous prime is 2101431203. The next prime is 2101431209. The reversal of 2101431205 is 5021341012.

It is not a de Polignac number, because 2101431205 - 2¹ = 2101431203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101431203) 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, 80271 + ... + 103180.

It is an arithmetic number, because the mean of its divisors is an integer number (165106800).

Almost surely, 2^2101431205 is an apocalyptic number.

It is an amenable number.

2101431205 is a deficient number, since it is larger than the sum of its proper divisors (540277595).

2101431205 is a wasteful number, since it uses less digits than its factorization.

2101431205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183564.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2101431205 is about 45841.3700166127. The cubic root of 2101431205 is about 1280.8700150035.

Adding to 2101431205 its reverse (5021341012), we get a palindrome (7122772217).

The spelling of 2101431205 in words is "two billion, one hundred one million, four hundred thirty-one thousand, two hundred five".