121412221 has 4 divisors (see below), whose sum is σ = 138756832. Its totient is φ = 104067612.

The previous prime is 121412219. The next prime is 121412227. The reversal of 121412221 is 122214121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121412221 - 2¹ = 121412219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121412195 and 121412204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121412227) 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, 8672295 + ... + 8672308.

It is an arithmetic number, because the mean of its divisors is an integer number (34689208).

Almost surely, 2^121412221 is an apocalyptic number.

It is an amenable number.

121412221 is a deficient number, since it is larger than the sum of its proper divisors (17344611).

121412221 is an equidigital number, since it uses as much as digits as its factorization.

121412221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344610.

The product of its digits is 64, while the sum is 16.

The square root of 121412221 is about 11018.7213868035. The cubic root of 121412221 is about 495.1697829312.

Adding to 121412221 its reverse (122214121), we get a palindrome (243626342).

The spelling of 121412221 in words is "one hundred twenty-one million, four hundred twelve thousand, two hundred twenty-one".