121113131221 has 8 divisors (see below), whose sum is σ = 124475671584. Its totient is φ = 117775407120.

The previous prime is 121113131203. The next prime is 121113131239. The reversal of 121113131221 is 122131311121.

It is an interprime number because it is at equal distance from previous prime (121113131203) and next prime (121113131239).

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 121113131221 - 2¹¹ = 121113129173 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 (121113131921) 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, 6194170 + ... + 6213691.

It is an arithmetic number, because the mean of its divisors is an integer number (15559458948).

Almost surely, 2^121113131221 is an apocalyptic number.

It is an amenable number.

121113131221 is a deficient number, since it is larger than the sum of its proper divisors (3362540363).

121113131221 is a wasteful number, since it uses less digits than its factorization.

121113131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12408131.

The product of its digits is 72, while the sum is 19.

Adding to 121113131221 its reverse (122131311121), we get a palindrome (243244442342).

The spelling of 121113131221 in words is "one hundred twenty-one billion, one hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-one".