216320265212 has 12 divisors (see below), whose sum is σ = 378699200880. Its totient is φ = 108120493536.

The previous prime is 216320265199. The next prime is 216320265241. The reversal of 216320265212 is 212562023612.

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, 9897488 + ... + 9919319.

It is an arithmetic number, because the mean of its divisors is an integer number (31558266740).

Almost surely, 2^216320265212 is an apocalyptic number.

It is an amenable number.

216320265212 is a deficient number, since it is larger than the sum of its proper divisors (162378935668).

216320265212 is a wasteful number, since it uses less digits than its factorization.

216320265212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19819540 (or 19819538 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 216320265212 its reverse (212562023612), we get a palindrome (428882288824).

The spelling of 216320265212 in words is "two hundred sixteen billion, three hundred twenty million, two hundred sixty-five thousand, two hundred twelve".