121313232221 has 8 divisors (see below), whose sum is σ = 127704897600. Its totient is φ = 114922242720.

The previous prime is 121313232193. The next prime is 121313232223. The reversal of 121313232221 is 122232313121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121313232221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313232223) 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, 222776 + ... + 540606.

It is an arithmetic number, because the mean of its divisors is an integer number (15963112200).

Almost surely, 2^121313232221 is an apocalyptic number.

It is an amenable number.

121313232221 is a deficient number, since it is larger than the sum of its proper divisors (6391665379).

121313232221 is a wasteful number, since it uses less digits than its factorization.

121313232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337939.

The product of its digits is 864, while the sum is 23.

Adding to 121313232221 its reverse (122232313121), we get a palindrome (243545545342).

The spelling of 121313232221 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred thirty-two thousand, two hundred twenty-one".