212101616 has 20 divisors (see below), whose sum is σ = 415018824. Its totient is φ = 105000000.

The previous prime is 212101577. The next prime is 212101627. The reversal of 212101616 is 616101212.

It is a super-2 number, since 2×212101616² = 89974191019622912, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64010 + ... + 67241.

Almost surely, 2^212101616 is an apocalyptic number.

It is an amenable number.

212101616 is a deficient number, since it is larger than the sum of its proper divisors (202917208).

212101616 is a wasteful number, since it uses less digits than its factorization.

212101616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131360 (or 131354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 212101616 is about 14563.7088682794. The cubic root of 212101616 is about 596.3684492631.

Adding to 212101616 its reverse (616101212), we get a palindrome (828202828).

The spelling of 212101616 in words is "two hundred twelve million, one hundred one thousand, six hundred sixteen".