221124231 has 12 divisors (see below), whose sum is σ = 333289008. Its totient is φ = 141006624.

The previous prime is 221124221. The next prime is 221124251. The reversal of 221124231 is 132421122.

It is a happy number.

221124231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221124231 - 2¹⁵ = 221091463 is a prime.

It is a super-2 number, since 2×221124231² = 97791851070682722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221124221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533910 + ... + 534323.

It is an arithmetic number, because the mean of its divisors is an integer number (27774084).

Almost surely, 2^221124231 is an apocalyptic number.

221124231 is a deficient number, since it is larger than the sum of its proper divisors (112164777).

221124231 is a wasteful number, since it uses less digits than its factorization.

221124231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068262 (or 1068259 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 221124231 is about 14870.2465009831. The cubic root of 221124231 is about 604.7076255025.

Adding to 221124231 its reverse (132421122), we get a palindrome (353545353).

The spelling of 221124231 in words is "two hundred twenty-one million, one hundred twenty-four thousand, two hundred thirty-one".