221211321102 has 24 divisors (see below), whose sum is σ = 483065147136. Its totient is φ = 73156499136.

The previous prime is 221211321041. The next prime is 221211321127. The reversal of 221211321102 is 201123112122.

221211321102 is a `hidden beast` number, since 221 + 21 + 1 + 321 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 48381643 + ... + 48386214.

It is an arithmetic number, because the mean of its divisors is an integer number (20127714464).

Almost surely, 2^221211321102 is an apocalyptic number.

221211321102 is an abundant number, since it is smaller than the sum of its proper divisors (261853826034).

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

221211321102 is a wasteful number, since it uses less digits than its factorization.

221211321102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96767992 (or 96767989 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221211321102 its reverse (201123112122), we get a palindrome (422334433224).

The spelling of 221211321102 in words is "two hundred twenty-one billion, two hundred eleven million, three hundred twenty-one thousand, one hundred two".