121121219 has 8 divisors (see below), whose sum is σ = 127937040. Its totient is φ = 114349536.

The previous prime is 121121213. The next prime is 121121227. The reversal of 121121219 is 912121121.

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 121121219 - 2¹² = 121117123 is a prime.

It is a super-2 number, since 2×121121219² = 29340699384091922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121121219.

It is not an unprimeable number, because it can be changed into a prime (121121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5312 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (15992130).

Almost surely, 2^121121219 is an apocalyptic number.

121121219 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121121219 is a deficient number, since it is larger than the sum of its proper divisors (6815821).

121121219 is a wasteful number, since it uses less digits than its factorization.

121121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22069.

The product of its digits is 72, while the sum is 20.

The square root of 121121219 is about 11005.5085752545. The cubic root of 121121219 is about 494.7738571817.

It can be divided in two parts, 12112 and 1219, that added together give a palindrome (13331).

The spelling of 121121219 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred nineteen".