121222019 has 4 divisors (see below), whose sum is σ = 128352744. Its totient is φ = 114091296.

The previous prime is 121222007. The next prime is 121222037. The reversal of 121222019 is 910222121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910222121 = 79 ⋅11521799.

It is a cyclic number.

It is not a de Polignac number, because 121222019 - 2¹² = 121217923 is a prime.

It is a super-2 number, since 2×121222019² = 29389555780872722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565337 + ... + 3565370.

It is an arithmetic number, because the mean of its divisors is an integer number (32088186).

Almost surely, 2^121222019 is an apocalyptic number.

121222019 is a deficient number, since it is larger than the sum of its proper divisors (7130725).

121222019 is an equidigital number, since it uses as much as digits as its factorization.

121222019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130724.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 121222019 is about 11010.0871477023. The cubic root of 121222019 is about 494.9110733699.

It can be divided in two parts, 12122 and 2019, that added together give a palindrome (14141).

The spelling of 121222019 in words is "one hundred twenty-one million, two hundred twenty-two thousand, nineteen".