2121707005 has 16 divisors (see below), whose sum is σ = 2810977344. Its totient is φ = 1524465280.

The previous prime is 2121706973. The next prime is 2121707009. The reversal of 2121707005 is 5007071212.

It is a happy number.

It is not a de Polignac number, because 2121707005 - 2⁵ = 2121706973 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 (2121707009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227824 + ... + 236953.

It is an arithmetic number, because the mean of its divisors is an integer number (175686084).

Almost surely, 2^2121707005 is an apocalyptic number.

It is an amenable number.

2121707005 is a deficient number, since it is larger than the sum of its proper divisors (689270339).

2121707005 is a wasteful number, since it uses less digits than its factorization.

2121707005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464876.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 2121707005 is about 46061.9908927089. The cubic root of 2121707005 is about 1284.9763565121.

Adding to 2121707005 its reverse (5007071212), we get a palindrome (7128778217).

The spelling of 2121707005 in words is "two billion, one hundred twenty-one million, seven hundred seven thousand, five".