12102102221 has 8 divisors (see below), whose sum is σ = 13204857600. Its totient is φ = 10999774240.

The previous prime is 12102102157. The next prime is 12102102223. The reversal of 12102102221 is 12220120121.

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

It is a cyclic number.

It is not a de Polignac number, because 12102102221 - 2⁶ = 12102102157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102102196 and 12102102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102102223) 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, 46136 + ... + 162273.

It is an arithmetic number, because the mean of its divisors is an integer number (1650607200).

Almost surely, 2^12102102221 is an apocalyptic number.

12102102221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102102221 is a deficient number, since it is larger than the sum of its proper divisors (1102755379).

12102102221 is a wasteful number, since it uses less digits than its factorization.

12102102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213699.

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

Adding to 12102102221 its reverse (12220120121), we get a palindrome (24322222342).

The spelling of 12102102221 in words is "twelve billion, one hundred two million, one hundred two thousand, two hundred twenty-one".