224213121 has 36 divisors (see below), whose sum is σ = 357944496. Its totient is φ = 135138960.

The previous prime is 224213117. The next prime is 224213147. The reversal of 224213121 is 121312422.

It is a happy number.

It is not a de Polignac number, because 224213121 - 2² = 224213117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224213094 and 224213103.

It is not an unprimeable number, because it can be changed into a prime (224213621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 246750 + ... + 247656.

Almost surely, 2^224213121 is an apocalyptic number.

It is an amenable number.

224213121 is a deficient number, since it is larger than the sum of its proper divisors (133731375).

224213121 is a wasteful number, since it uses less digits than its factorization.

224213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1148 counting only the distinct ones).

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

The square root of 224213121 is about 14973.7477272726. The cubic root of 224213121 is about 607.5103407273.

Adding to 224213121 its reverse (121312422), we get a palindrome (345525543).

The spelling of 224213121 in words is "two hundred twenty-four million, two hundred thirteen thousand, one hundred twenty-one".