221224440124 has 12 divisors (see below), whose sum is σ = 390760927704. Its totient is φ = 109578460784.

The previous prime is 221224440113. The next prime is 221224440127. The reversal of 221224440124 is 421044422122.

It is a happy number.

It is a super-2 number, since 2×221224440124² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221224440092 and 221224440101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221224440127) 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 3 ways as a sum of consecutive naturals, for example, 258439339 + ... + 258440194.

It is an arithmetic number, because the mean of its divisors is an integer number (32563410642).

Almost surely, 2^221224440124 is an apocalyptic number.

It is an amenable number.

221224440124 is a deficient number, since it is larger than the sum of its proper divisors (169536487580).

221224440124 is a wasteful number, since it uses less digits than its factorization.

221224440124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516879644 (or 516879642 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 221224440124 its reverse (421044422122), we get a palindrome (642268862246).

The spelling of 221224440124 in words is "two hundred twenty-one billion, two hundred twenty-four million, four hundred forty thousand, one hundred twenty-four".