221201111102 has 4 divisors (see below), whose sum is σ = 331801666656. Its totient is φ = 110600555550.

The previous prime is 221201111101. The next prime is 221201111123. The reversal of 221201111102 is 201111102122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55300277774 + ... + 55300277777.

It is an arithmetic number, because the mean of its divisors is an integer number (82950416664).

Almost surely, 2^221201111102 is an apocalyptic number.

221201111102 is a deficient number, since it is larger than the sum of its proper divisors (110600555554).

221201111102 is a wasteful number, since it uses less digits than its factorization.

221201111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110600555553.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221201111102 its reverse (201111102122), we get a palindrome (422312213224).

The spelling of 221201111102 in words is "two hundred twenty-one billion, two hundred one million, one hundred eleven thousand, one hundred two".