2104121405 has 8 divisors (see below), whose sum is σ = 2527241472. Its totient is φ = 1681766608.

The previous prime is 2104121347. The next prime is 2104121407. The reversal of 2104121405 is 5041214012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104121405 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 (2104121407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185249 + ... + 196278.

It is an arithmetic number, because the mean of its divisors is an integer number (315905184).

Almost surely, 2^2104121405 is an apocalyptic number.

It is an amenable number.

2104121405 is a deficient number, since it is larger than the sum of its proper divisors (423120067).

2104121405 is a wasteful number, since it uses less digits than its factorization.

2104121405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382635.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2104121405 is about 45870.7031230174. The cubic root of 2104121405 is about 1281.4163612497.

Adding to 2104121405 its reverse (5041214012), we get a palindrome (7145335417).

The spelling of 2104121405 in words is "two billion, one hundred four million, one hundred twenty-one thousand, four hundred five".