421231223 has 16 divisors (see below), whose sum is σ = 503777280. Its totient is φ = 344367936.

The previous prime is 421231141. The next prime is 421231231. The reversal of 421231223 is 322132124.

It is a cyclic number.

It is not a de Polignac number, because 421231223 - 2¹² = 421227127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421231195 and 421231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421231123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55523 + ... + 62651.

It is an arithmetic number, because the mean of its divisors is an integer number (31486080).

Almost surely, 2^421231223 is an apocalyptic number.

421231223 is a deficient number, since it is larger than the sum of its proper divisors (82546057).

421231223 is a wasteful number, since it uses less digits than its factorization.

421231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526.

The product of its digits is 576, while the sum is 20.

The square root of 421231223 is about 20523.9183149807. The cubic root of 421231223 is about 749.6183083001.

Adding to 421231223 its reverse (322132124), we get a palindrome (743363347).

Subtracting from 421231223 its reverse (322132124), we obtain a palindrome (99099099).

The spelling of 421231223 in words is "four hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-three".