121322221 has 8 divisors (see below), whose sum is σ = 124941344. Its totient is φ = 117739440.

The previous prime is 121322213. The next prime is 121322237. The reversal of 121322221 is 122223121.

It is a happy number.

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 121322221 - 2³ = 121322213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121322195 and 121322204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121322281) 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, 2235 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (15617668).

Almost surely, 2^121322221 is an apocalyptic number.

It is an amenable number.

121322221 is a deficient number, since it is larger than the sum of its proper divisors (3619123).

121322221 is a wasteful number, since it uses less digits than its factorization.

121322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18171.

The product of its digits is 96, while the sum is 16.

The square root of 121322221 is about 11014.6366712661. The cubic root of 121322221 is about 495.0474001475.

Adding to 121322221 its reverse (122223121), we get a palindrome (243545342).

The spelling of 121322221 in words is "one hundred twenty-one million, three hundred twenty-two thousand, two hundred twenty-one".