2500121105 has 4 divisors (see below), whose sum is σ = 3000145332. Its totient is φ = 2000096880.

The previous prime is 2500121101. The next prime is 2500121123. The reversal of 2500121105 is 5011210052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 269353744 + 2230767361 = 16412^2 + 47231^2 .

It is not a de Polignac number, because 2500121105 - 2² = 2500121101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2500121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250012106 + ... + 250012115.

It is an arithmetic number, because the mean of its divisors is an integer number (750036333).

Almost surely, 2^2500121105 is an apocalyptic number.

It is an amenable number.

2500121105 is a deficient number, since it is larger than the sum of its proper divisors (500024227).

2500121105 is an equidigital number, since it uses as much as digits as its factorization.

2500121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500024226.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 2500121105 is about 50001.2110353339. The cubic root of 2500121105 is about 1357.2307232466.

Adding to 2500121105 its reverse (5011210052), we get a palindrome (7511331157).

The spelling of 2500121105 in words is "two billion, five hundred million, one hundred twenty-one thousand, one hundred five".