2500021105 has 16 divisors (see below), whose sum is σ = 3182650704. Its totient is φ = 1878722560.

The previous prime is 2500021093. The next prime is 2500021127. The reversal of 2500021105 is 5011200052.

It can be written as a sum of positive squares in 8 ways, for example, as 121104 + 2499900001 = 348^2 + 49999^2 .

It is not a de Polignac number, because 2500021105 - 2⁷ = 2500020977 is a prime.

It is a Duffinian number.

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, 16059 + ... + 72511.

It is an arithmetic number, because the mean of its divisors is an integer number (198915669).

Almost surely, 2^2500021105 is an apocalyptic number.

It is an amenable number.

2500021105 is a deficient number, since it is larger than the sum of its proper divisors (682629599).

2500021105 is a wasteful number, since it uses less digits than its factorization.

2500021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56996.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2500021105 is about 50000.2110495546. The cubic root of 2500021105 is about 1357.2126274723.

Adding to 2500021105 its reverse (5011200052), we get a palindrome (7511221157).

The spelling of 2500021105 in words is "two billion, five hundred million, twenty-one thousand, one hundred five".