221210021212102 has 24 divisors (see below), whose sum is σ = 366081963234624. Its totient is φ = 100170575635104.

The previous prime is 221210021212079. The next prime is 221210021212157. The reversal of 221210021212102 is 201212120012122.

221210021212102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221210021212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6174203958 + ... + 6174239785.

It is an arithmetic number, because the mean of its divisors is an integer number (15253415134776).

Almost surely, 2^{221210021212102} is an apocalyptic number.

221210021212102 is a deficient number, since it is larger than the sum of its proper divisors (144871942022522).

221210021212102 is a wasteful number, since it uses less digits than its factorization.

221210021212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12348443824 (or 12348443811 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221210021212102 its reverse (201212120012122), we get a palindrome (422422141224224).

The spelling of 221210021212102 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, two hundred twelve thousand, one hundred two".