2100661106 has 4 divisors (see below), whose sum is σ = 3150991662. Its totient is φ = 1050330552.

The previous prime is 2100661097. The next prime is 2100661177. The reversal of 2100661106 is 6011660012.

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., 1643086225 + 457574881 = 40535^2 + 21391^2 .

It is a super-2 number, since 2×2100661106² = 8825554164522286472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525165275 + ... + 525165278.

Almost surely, 2^2100661106 is an apocalyptic number.

2100661106 is a deficient number, since it is larger than the sum of its proper divisors (1050330556).

2100661106 is a wasteful number, since it uses less digits than its factorization.

2100661106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050330555.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2100661106 is about 45832.9696397691. The cubic root of 2100661106 is about 1280.7135316137.

The spelling of 2100661106 in words is "two billion, one hundred million, six hundred sixty-one thousand, one hundred six".