219197121 has 32 divisors (see below), whose sum is σ = 347276160. Its totient is φ = 121228800.

The previous prime is 219197119. The next prime is 219197149. The reversal of 219197121 is 121791912.

It is not a de Polignac number, because 219197121 - 2¹ = 219197119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (219197171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35311 + ... + 41051.

It is an arithmetic number, because the mean of its divisors is an integer number (10852380).

Almost surely, 2^219197121 is an apocalyptic number.

It is an amenable number.

219197121 is a deficient number, since it is larger than the sum of its proper divisors (128079039).

219197121 is a wasteful number, since it uses less digits than its factorization.

219197121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857.

The product of its digits is 2268, while the sum is 33.

The square root of 219197121 is about 14805.3071903287. The cubic root of 219197121 is about 602.9458105529.

The spelling of 219197121 in words is "two hundred nineteen million, one hundred ninety-seven thousand, one hundred twenty-one".