216210122 has 4 divisors (see below), whose sum is σ = 324315186. Its totient is φ = 108105060.

The previous prime is 216210107. The next prime is 216210157. The reversal of 216210122 is 221012612.

216210122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 184389241 + 31820881 = 13579^2 + 5641^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216210122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54052529 + ... + 54052532.

Almost surely, 2^216210122 is an apocalyptic number.

216210122 is a deficient number, since it is larger than the sum of its proper divisors (108105064).

216210122 is a wasteful number, since it uses less digits than its factorization.

216210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108105063.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 216210122 is about 14704.0852146606. The cubic root of 216210122 is about 600.1944943538.

Adding to 216210122 its reverse (221012612), we get a palindrome (437222734).

The spelling of 216210122 in words is "two hundred sixteen million, two hundred ten thousand, one hundred twenty-two".