2104121505 has 16 divisors (see below), whose sum is σ = 3369884544. Its totient is φ = 1121101440.

The previous prime is 2104121483. The next prime is 2104121527. The reversal of 2104121505 is 5051214012.

It is an interprime number because it is at equal distance from previous prime (2104121483) and next prime (2104121527).

It is not a de Polignac number, because 2104121505 - 2¹⁷ = 2103990433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52564 + ... + 83493.

It is an arithmetic number, because the mean of its divisors is an integer number (210617784).

Almost surely, 2^2104121505 is an apocalyptic number.

It is an amenable number.

2104121505 is a deficient number, since it is larger than the sum of its proper divisors (1265763039).

2104121505 is a wasteful number, since it uses less digits than its factorization.

2104121505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137096.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2104121505 is about 45870.7042130378. The cubic root of 2104121505 is about 1281.4163815498.

Adding to 2104121505 its reverse (5051214012), we get a palindrome (7155335517).

The spelling of 2104121505 in words is "two billion, one hundred four million, one hundred twenty-one thousand, five hundred five".