221660210102 has 16 divisors (see below), whose sum is σ = 333264594240. Its totient is φ = 110572093632.

The previous prime is 221660210099. The next prime is 221660210111. The reversal of 221660210102 is 201012066122.

It is a happy number.

221660210102 is digitally balanced in base 3, 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6677498 + ... + 6710610.

It is an arithmetic number, because the mean of its divisors is an integer number (20829037140).

Almost surely, 2^221660210102 is an apocalyptic number.

221660210102 is a deficient number, since it is larger than the sum of its proper divisors (111604384138).

221660210102 is a wasteful number, since it uses less digits than its factorization.

221660210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40807.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 221660210102 its reverse (201012066122), we get a palindrome (422672276224).

The spelling of 221660210102 in words is "two hundred twenty-one billion, six hundred sixty million, two hundred ten thousand, one hundred two".