121552219 has 4 divisors (see below), whose sum is σ = 121720144. Its totient is φ = 121384296.

The previous prime is 121552183. The next prime is 121552241. The reversal of 121552219 is 912255121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912255121 = 27943 ⋅32647.

It is a cyclic number.

It is not a de Polignac number, because 121552219 - 2¹⁹ = 121027931 is a prime.

It is a super-2 number, since 2×121552219² = 29549883887647922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121552259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82872 + ... + 84325.

It is an arithmetic number, because the mean of its divisors is an integer number (30430036).

Almost surely, 2^121552219 is an apocalyptic number.

121552219 is a deficient number, since it is larger than the sum of its proper divisors (167925).

121552219 is an equidigital number, since it uses as much as digits as its factorization.

121552219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167924.

The product of its digits is 1800, while the sum is 28.

The square root of 121552219 is about 11025.0722900124. The cubic root of 121552219 is about 495.3600332779.

It can be divided in two parts, 121552 and 219, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 121552219 in words is "one hundred twenty-one million, five hundred fifty-two thousand, two hundred nineteen".