216121220222 has 16 divisors (see below), whose sum is σ = 327380831232. Its totient is φ = 106994607480.

The previous prime is 216121220191. The next prime is 216121220243. The reversal of 216121220222 is 222022121612.

216121220222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281647 + ... + 1440437.

It is an arithmetic number, because the mean of its divisors is an integer number (20461301952).

Almost surely, 2^216121220222 is an apocalyptic number.

216121220222 is a deficient number, since it is larger than the sum of its proper divisors (111259611010).

216121220222 is a wasteful number, since it uses less digits than its factorization.

216121220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165503.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 216121220222 its reverse (222022121612), we get a palindrome (438143341834).

The spelling of 216121220222 in words is "two hundred sixteen billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".