219364121 has 4 divisors (see below), whose sum is σ = 219393744. Its totient is φ = 219334500.

The previous prime is 219364109. The next prime is 219364127. The reversal of 219364121 is 121463912.

219364121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 219364121 - 2²² = 215169817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219364127) 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, 7346 + ... + 22196.

It is an arithmetic number, because the mean of its divisors is an integer number (54848436).

Almost surely, 2^219364121 is an apocalyptic number.

It is an amenable number.

219364121 is a deficient number, since it is larger than the sum of its proper divisors (29623).

219364121 is a wasteful number, since it uses less digits than its factorization.

219364121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29622.

The product of its digits is 2592, while the sum is 29.

The square root of 219364121 is about 14810.9459859929. The cubic root of 219364121 is about 603.0988940565.

The spelling of 219364121 in words is "two hundred nineteen million, three hundred sixty-four thousand, one hundred twenty-one".