219881121 has 8 divisors (see below), whose sum is σ = 301098624. Its totient is φ = 142625520.

The previous prime is 219881119. The next prime is 219881159. The reversal of 219881121 is 121188912.

219881121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 219881121 - 2¹ = 219881119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (219881021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990345 + ... + 990566.

It is an arithmetic number, because the mean of its divisors is an integer number (37637328).

Almost surely, 2^219881121 is an apocalyptic number.

It is an amenable number.

219881121 is a deficient number, since it is larger than the sum of its proper divisors (81217503).

219881121 is a wasteful number, since it uses less digits than its factorization.

219881121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980951.

The product of its digits is 2304, while the sum is 33.

The square root of 219881121 is about 14828.3890224124. The cubic root of 219881121 is about 603.5723192365.

The spelling of 219881121 in words is "two hundred nineteen million, eight hundred eighty-one thousand, one hundred twenty-one".