234421221 has 32 divisors (see below), whose sum is σ = 345738240. Its totient is φ = 140621184.

The previous prime is 234421217. The next prime is 234421237. The reversal of 234421221 is 122124432.

It is not a de Polignac number, because 234421221 - 2² = 234421217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234421241) 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, 213145 + ... + 214241.

It is an arithmetic number, because the mean of its divisors is an integer number (10804320).

Almost surely, 2^234421221 is an apocalyptic number.

It is an amenable number.

234421221 is a deficient number, since it is larger than the sum of its proper divisors (111317019).

234421221 is a wasteful number, since it uses less digits than its factorization.

234421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305.

The product of its digits is 768, while the sum is 21.

The square root of 234421221 is about 15310.8203895154. The cubic root of 234421221 is about 616.5935459767.

Adding to 234421221 its reverse (122124432), we get a palindrome (356545653).

It can be divided in two parts, 23442 and 1221, that multiplied together give a palindrome (28622682).

The spelling of 234421221 in words is "two hundred thirty-four million, four hundred twenty-one thousand, two hundred twenty-one".