2102166061 has 4 divisors (see below), whose sum is σ = 2212806400. Its totient is φ = 1991525724.

The previous prime is 2102165999. The next prime is 2102166089. The reversal of 2102166061 is 1606612012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102166061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102166961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55320141 + ... + 55320178.

It is an arithmetic number, because the mean of its divisors is an integer number (553201600).

Almost surely, 2^2102166061 is an apocalyptic number.

It is an amenable number.

2102166061 is a deficient number, since it is larger than the sum of its proper divisors (110640339).

2102166061 is a wasteful number, since it uses less digits than its factorization.

2102166061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110640338.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2102166061 is about 45849.3845214960. The cubic root of 2102166061 is about 1281.0193014070.

Adding to 2102166061 its reverse (1606612012), we get a palindrome (3708778073).

The spelling of 2102166061 in words is "two billion, one hundred two million, one hundred sixty-six thousand, sixty-one".