121210219 has 4 divisors (see below), whose sum is σ = 130534096. Its totient is φ = 111886344.

The previous prime is 121210213. The next prime is 121210231. The reversal of 121210219 is 912012121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121210219 - 2²⁵ = 87655787 is a prime.

It is a super-2 number, since 2×121210219² = 29383834380055922, 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 = 121210196 and 121210205.

It is not an unprimeable number, because it can be changed into a prime (121210213) 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, 4661919 + ... + 4661944.

It is an arithmetic number, because the mean of its divisors is an integer number (32633524).

Almost surely, 2^121210219 is an apocalyptic number.

121210219 is a deficient number, since it is larger than the sum of its proper divisors (9323877).

121210219 is an equidigital number, since it uses as much as digits as its factorization.

121210219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323876.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121210219 is about 11009.5512624266. The cubic root of 121210219 is about 494.8950142958.

It can be divided in two parts, 1212102 and 19, that added together give a palindrome (1212121).

The spelling of 121210219 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred nineteen".