221221100102 has 8 divisors (see below), whose sum is σ = 334444498176. Its totient is φ = 109739600712.

The previous prime is 221221100041. The next prime is 221221100141. The reversal of 221221100102 is 201001122122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 435474353 + ... + 435474860.

It is an arithmetic number, because the mean of its divisors is an integer number (41805562272).

Almost surely, 2^221221100102 is an apocalyptic number.

221221100102 is a deficient number, since it is larger than the sum of its proper divisors (113223398074).

221221100102 is a wasteful number, since it uses less digits than its factorization.

221221100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870949342.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221221100102 its reverse (201001122122), we get a palindrome (422222222224).

The spelling of 221221100102 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, one hundred two".