12102111221 has 8 divisors (see below), whose sum is σ = 12390919200. Its totient is φ = 11813638032.

The previous prime is 12102111193. The next prime is 12102111247. The reversal of 12102111221 is 12211120121.

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 12102111221 - 2¹⁰ = 12102110197 is a prime.

It is a super-2 number, since 2×12102111221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102111196 and 12102111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102111821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9770 + ... + 155883.

It is an arithmetic number, because the mean of its divisors is an integer number (1548864900).

Almost surely, 2^12102111221 is an apocalyptic number.

It is an amenable number.

12102111221 is a deficient number, since it is larger than the sum of its proper divisors (288807979).

12102111221 is a wasteful number, since it uses less digits than its factorization.

12102111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167395.

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

Adding to 12102111221 its reverse (12211120121), we get a palindrome (24313231342).

The spelling of 12102111221 in words is "twelve billion, one hundred two million, one hundred eleven thousand, two hundred twenty-one".