121445219 has 4 divisors (see below), whose sum is σ = 138794544. Its totient is φ = 104095896.

The previous prime is 121445213. The next prime is 121445231. The reversal of 121445219 is 912544121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912544121 = 6473 ⋅140977.

It is a cyclic number.

It is not a de Polignac number, because 121445219 - 2⁸ = 121444963 is a prime.

It is a super-2 number, since 2×121445219² = 29497882435915922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121445191 and 121445200.

It is not an unprimeable number, because it can be changed into a prime (121445213) 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, 8674652 + ... + 8674665.

It is an arithmetic number, because the mean of its divisors is an integer number (34698636).

Almost surely, 2^121445219 is an apocalyptic number.

121445219 is a deficient number, since it is larger than the sum of its proper divisors (17349325).

121445219 is an equidigital number, since it uses as much as digits as its factorization.

121445219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17349324.

The product of its digits is 2880, while the sum is 29.

The square root of 121445219 is about 11020.2186457438. The cubic root of 121445219 is about 495.2146387463.

The spelling of 121445219 in words is "one hundred twenty-one million, four hundred forty-five thousand, two hundred nineteen".