121222321 has 8 divisors (see below), whose sum is σ = 133553088. Its totient is φ = 109110000.

The previous prime is 121222273. The next prime is 121222331. The reversal of 121222321 is 123222121.

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 121222321 - 2⁷ = 121222193 is a prime.

It is a super-2 number, since 2×121222321² = 29389702217254082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222295 and 121222304.

It is not an unprimeable number, because it can be changed into a prime (121222331) 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, 53445 + ... + 55666.

It is an arithmetic number, because the mean of its divisors is an integer number (16694136).

Almost surely, 2^121222321 is an apocalyptic number.

121222321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121222321 is a deficient number, since it is larger than the sum of its proper divisors (12330767).

121222321 is a wasteful number, since it uses less digits than its factorization.

121222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109223.

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

The square root of 121222321 is about 11010.1008623900. The cubic root of 121222321 is about 494.9114843597.

Adding to 121222321 its reverse (123222121), we get a palindrome (244444442).

The spelling of 121222321 in words is "one hundred twenty-one million, two hundred twenty-two thousand, three hundred twenty-one".