221201221102 has 4 divisors (see below), whose sum is σ = 331801831656. Its totient is φ = 110600610550.

The previous prime is 221201221079. The next prime is 221201221117. The reversal of 221201221102 is 201122102122.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55300305274 + ... + 55300305277.

It is an arithmetic number, because the mean of its divisors is an integer number (82950457914).

Almost surely, 2^221201221102 is an apocalyptic number.

221201221102 is a deficient number, since it is larger than the sum of its proper divisors (110600610554).

221201221102 is a wasteful number, since it uses less digits than its factorization.

221201221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110600610553.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221201221102 its reverse (201122102122), we get a palindrome (422323323224).

The spelling of 221201221102 in words is "two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred two".