12101231221 has 8 divisors (see below), whose sum is σ = 12397843584. Its totient is φ = 11804688480.

The previous prime is 12101231213. The next prime is 12101231237. The reversal of 12101231221 is 12213210121.

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 12101231221 - 2³ = 12101231213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101231195 and 12101231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101231251) 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, 593620 + ... + 613666.

It is an arithmetic number, because the mean of its divisors is an integer number (1549730448).

Almost surely, 2^12101231221 is an apocalyptic number.

It is an amenable number.

12101231221 is a deficient number, since it is larger than the sum of its proper divisors (296612363).

12101231221 is a wasteful number, since it uses less digits than its factorization.

12101231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34811.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12101231221 its reverse (12213210121), we get a palindrome (24314441342).

The spelling of 12101231221 in words is "twelve billion, one hundred one million, two hundred thirty-one thousand, two hundred twenty-one".