2104121205 has 48 divisors (see below), whose sum is σ = 3795215424. Its totient is φ = 1118344320.

The previous prime is 2104121119. The next prime is 2104121207. The reversal of 2104121205 is 5021214012.

It is not a de Polignac number, because 2104121205 - 2¹⁶ = 2104055669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104121207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370185 + ... + 375825.

It is an arithmetic number, because the mean of its divisors is an integer number (79066988).

Almost surely, 2^2104121205 is an apocalyptic number.

It is an amenable number.

2104121205 is a deficient number, since it is larger than the sum of its proper divisors (1691094219).

2104121205 is an equidigital number, since it uses as much as digits as its factorization.

2104121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968 (or 5956 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2104121205 is about 45870.7009429767. The cubic root of 2104121205 is about 1281.4163206495.

Adding to 2104121205 its reverse (5021214012), we get a palindrome (7125335217).

It can be divided in two parts, 2104121 and 205, that added together give a triangular number (2104326 = T₂₀₅₁).

The spelling of 2104121205 in words is "two billion, one hundred four million, one hundred twenty-one thousand, two hundred five".