221224100031 has 12 divisors (see below), whose sum is σ = 348595551720. Its totient is φ = 134075212080.

The previous prime is 221224100017. The next prime is 221224100063. The reversal of 221224100031 is 130001422122.

It is a happy number.

221224100031 is a `hidden beast` number, since 221 + 2 + 2 + 410 + 0 + 0 + 31 = 666.

It is not a de Polignac number, because 221224100031 - 2¹⁰ = 221224099007 is a prime.

It is a super-2 number, since 2×221224100031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221224099977 and 221224100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221224100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117293336 + ... + 1117293533.

It is an arithmetic number, because the mean of its divisors is an integer number (29049629310).

Almost surely, 2^221224100031 is an apocalyptic number.

221224100031 is a deficient number, since it is larger than the sum of its proper divisors (127371451689).

221224100031 is a wasteful number, since it uses less digits than its factorization.

221224100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234586886 (or 2234586883 counting only the distinct ones).

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

Adding to 221224100031 its reverse (130001422122), we get a palindrome (351225522153).

The spelling of 221224100031 in words is "two hundred twenty-one billion, two hundred twenty-four million, one hundred thousand, thirty-one".