221001102102 has 32 divisors (see below), whose sum is σ = 493397815680. Its totient is φ = 65412587520.

The previous prime is 221001102071. The next prime is 221001102149. The reversal of 221001102102 is 201201100122.

221001102102 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 38933227 + ... + 38938902.

It is an arithmetic number, because the mean of its divisors is an integer number (15418681740).

Almost surely, 2^221001102102 is an apocalyptic number.

221001102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221001102102 is an abundant number, since it is smaller than the sum of its proper divisors (272396713578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221001102102 is a wasteful number, since it uses less digits than its factorization.

221001102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77872188.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221001102102 its reverse (201201100122), we get a palindrome (422202202224).

The spelling of 221001102102 in words is "two hundred twenty-one billion, one million, one hundred two thousand, one hundred two".