2121616166 has 8 divisors (see below), whose sum is σ = 3183143880. Its totient is φ = 1060568208.

The previous prime is 2121616157. The next prime is 2121616193. The reversal of 2121616166 is 6616161212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108671 + ... + 126698.

It is an arithmetic number, because the mean of its divisors is an integer number (397892985).

Almost surely, 2^2121616166 is an apocalyptic number.

2121616166 is a deficient number, since it is larger than the sum of its proper divisors (1061527714).

2121616166 is a wasteful number, since it uses less digits than its factorization.

2121616166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239878.

The product of its digits is 5184, while the sum is 32.

The square root of 2121616166 is about 46061.0048305505. The cubic root of 2121616166 is about 1284.9580178768.

Adding to 2121616166 its reverse (6616161212), we get a palindrome (8737777378).

The spelling of 2121616166 in words is "two billion, one hundred twenty-one million, six hundred sixteen thousand, one hundred sixty-six".