2104121005 has 12 divisors (see below), whose sum is σ = 2937181500. Its totient is φ = 1442825664.

The previous prime is 2104121003. The next prime is 2104121017. The reversal of 2104121005 is 5001214012.

It can be written as a sum of positive squares in 2 ways, for example, as 1315803076 + 788317929 = 36274^2 + 28077^2 .

It is not a de Polignac number, because 2104121005 - 2¹ = 2104121003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2104121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4293880 + ... + 4294369.

It is an arithmetic number, because the mean of its divisors is an integer number (244765125).

Almost surely, 2^2104121005 is an apocalyptic number.

It is an amenable number.

2104121005 is a deficient number, since it is larger than the sum of its proper divisors (833060495).

2104121005 is an equidigital number, since it uses as much as digits as its factorization.

2104121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588268 (or 8588261 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2104121005 is about 45870.6987629358. The cubic root of 2104121005 is about 1281.4162800493.

Adding to 2104121005 its reverse (5001214012), we get a palindrome (7105335017).

The spelling of 2104121005 in words is "two billion, one hundred four million, one hundred twenty-one thousand, five".