229912221 has 24 divisors (see below), whose sum is σ = 385091392. Its totient is φ = 119433600.

The previous prime is 229912211. The next prime is 229912237. The reversal of 229912221 is 122219922.

It is not a de Polignac number, because 229912221 - 2⁶ = 229912157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229912211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42700 + ... + 47781.

Almost surely, 2^229912221 is an apocalyptic number.

229912221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

229912221 is a deficient number, since it is larger than the sum of its proper divisors (155179171).

229912221 is a wasteful number, since it uses less digits than its factorization.

229912221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90513 (or 90502 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 229912221 is about 15162.8566240006. The cubic root of 229912221 is about 612.6146133428.

The spelling of 229912221 in words is "two hundred twenty-nine million, nine hundred twelve thousand, two hundred twenty-one".