224312121 has 12 divisors (see below), whose sum is σ = 353461680. Its totient is φ = 135946680.

The previous prime is 224312117. The next prime is 224312131. The reversal of 224312121 is 121213422.

It is a happy number.

224312121 is a `hidden beast` number, since 22 + 431 + 212 + 1 = 666.

It is not a de Polignac number, because 224312121 - 2² = 224312117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224312094 and 224312103.

It is not an unprimeable number, because it can be changed into a prime (224312131) 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, 1132791 + ... + 1132988.

It is an arithmetic number, because the mean of its divisors is an integer number (29455140).

Almost surely, 2^224312121 is an apocalyptic number.

It is an amenable number.

224312121 is a deficient number, since it is larger than the sum of its proper divisors (129149559).

224312121 is a wasteful number, since it uses less digits than its factorization.

224312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265796 (or 2265793 counting only the distinct ones).

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

The square root of 224312121 is about 14977.0531480662. The cubic root of 224312121 is about 607.5997417900.

Adding to 224312121 its reverse (121213422), we get a palindrome (345525543).

The spelling of 224312121 in words is "two hundred twenty-four million, three hundred twelve thousand, one hundred twenty-one".