2101510106 has 4 divisors (see below), whose sum is σ = 3152265162. Its totient is φ = 1050755052.

The previous prime is 2101510091. The next prime is 2101510139. The reversal of 2101510106 is 6010151012.

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

It can be written as a sum of positive squares in only one way, i.e., 1701150025 + 400360081 = 41245^2 + 20009^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525377525 + ... + 525377528.

Almost surely, 2^2101510106 is an apocalyptic number.

2101510106 is a deficient number, since it is larger than the sum of its proper divisors (1050755056).

2101510106 is a wasteful number, since it uses less digits than its factorization.

2101510106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050755055.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 2101510106 is about 45842.2305958163. The cubic root of 2101510106 is about 1280.8860454530.

Adding to 2101510106 its reverse (6010151012), we get a palindrome (8111661118).

The spelling of 2101510106 in words is "two billion, one hundred one million, five hundred ten thousand, one hundred six".