221111210102 has 16 divisors (see below), whose sum is σ = 349513723872. Its totient is φ = 104701819200.

The previous prime is 221111210101. The next prime is 221111210129. The reversal of 221111210102 is 201012111122.

221111210102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23791223 + ... + 23800514.

It is an arithmetic number, because the mean of its divisors is an integer number (21844607742).

Almost surely, 2^221111210102 is an apocalyptic number.

221111210102 is a deficient number, since it is larger than the sum of its proper divisors (128402513770).

221111210102 is a wasteful number, since it uses less digits than its factorization.

221111210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47591863.

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

Adding to 221111210102 its reverse (201012111122), we get a palindrome (422123321224).

The spelling of 221111210102 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, one hundred two".