2115210105 has 40 divisors (see below), whose sum is σ = 3797046792. Its totient is φ = 1126524672.

The previous prime is 2115210089. The next prime is 2115210107. The reversal of 2115210105 is 5010125112.

It can be written as a sum of positive squares in 4 ways, for example, as 112021056 + 2003189049 = 10584^2 + 44757^2 .

It is not a de Polignac number, because 2115210105 - 2⁴ = 2115210089 is a prime.

It is a super-2 number, since 2×2115210105² = 8948227576588222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2115210107) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 319509 + ... + 326061.

Almost surely, 2^2115210105 is an apocalyptic number.

It is an amenable number.

2115210105 is a deficient number, since it is larger than the sum of its proper divisors (1681836687).

2115210105 is an equidigital number, since it uses as much as digits as its factorization.

2115210105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367 (or 7358 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 2115210105 is about 45991.4133833697. The cubic root of 2115210105 is about 1283.6634358939.

Adding to 2115210105 its reverse (5010125112), we get a palindrome (7125335217).

The spelling of 2115210105 in words is "two billion, one hundred fifteen million, two hundred ten thousand, one hundred five".