224420131221 has 16 divisors (see below), whose sum is σ = 351539227200. Its totient is φ = 125549723520.

The previous prime is 224420131193. The next prime is 224420131259. The reversal of 224420131221 is 122131024422.

It is not a de Polignac number, because 224420131221 - 2⁵ = 224420131189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224420131191 and 224420131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224420131291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261561496 + ... + 261562353.

It is an arithmetic number, because the mean of its divisors is an integer number (21971201700).

Almost surely, 2^224420131221 is an apocalyptic number.

It is an amenable number.

224420131221 is a deficient number, since it is larger than the sum of its proper divisors (127119095979).

224420131221 is a wasteful number, since it uses less digits than its factorization.

224420131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523123876.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 224420131221 its reverse (122131024422), we get a palindrome (346551155643).

The spelling of 224420131221 in words is "two hundred twenty-four billion, four hundred twenty million, one hundred thirty-one thousand, two hundred twenty-one".