221210122 has 16 divisors (see below), whose sum is σ = 399176640. Its totient is φ = 89814528.

The previous prime is 221210111. The next prime is 221210131. The reversal of 221210122 is 221012122.

It is a happy number.

221210122 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415543 + ... + 416074.

It is an arithmetic number, because the mean of its divisors is an integer number (24948540).

Almost surely, 2^221210122 is an apocalyptic number.

221210122 is a deficient number, since it is larger than the sum of its proper divisors (177966518).

221210122 is a wasteful number, since it uses less digits than its factorization.

221210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831645.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221210122 is about 14873.1342359302. The cubic root of 221210122 is about 604.7859106351.

Adding to 221210122 its reverse (221012122), we get a palindrome (442222244).

The spelling of 221210122 in words is "two hundred twenty-one million, two hundred ten thousand, one hundred twenty-two".