12101232101221 has 4 divisors (see below), whose sum is σ = 12113225394700. Its totient is φ = 12089238807744.

The previous prime is 12101232101171. The next prime is 12101232101227. The reversal of 12101232101221 is 12210123210121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7222925002500 + 4878307098721 = 2687550^2 + 2208689^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101232101221 - 2⁹ = 12101232100709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101232101227) by changing a digit.

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, 5996645226 + ... + 5996647243.

It is an arithmetic number, because the mean of its divisors is an integer number (3028306348675).

Almost surely, 2^{12101232101221} is an apocalyptic number.

It is an amenable number.

12101232101221 is a deficient number, since it is larger than the sum of its proper divisors (11993293479).

12101232101221 is a wasteful number, since it uses less digits than its factorization.

12101232101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11993293478.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12101232101221 its reverse (12210123210121), we get a palindrome (24311355311342).

The spelling of 12101232101221 in words is "twelve trillion, one hundred one billion, two hundred thirty-two million, one hundred one thousand, two hundred twenty-one".