221201530424 has 64 divisors (see below), whose sum is σ = 477032371200. Its totient is φ = 94196592000.

The previous prime is 221201530397. The next prime is 221201530457. The reversal of 221201530424 is 424035102122.

It is a super-3 number, since 3×221201530424³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221201530393 and 221201530402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6152099 + ... + 6187949.

It is an arithmetic number, because the mean of its divisors is an integer number (7453630800).

Almost surely, 2^221201530424 is an apocalyptic number.

It is an amenable number.

221201530424 is an abundant number, since it is smaller than the sum of its proper divisors (255830840776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221201530424 is a wasteful number, since it uses less digits than its factorization.

221201530424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36564 (or 36560 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 221201530424 its reverse (424035102122), we get a palindrome (645236632546).

The spelling of 221201530424 in words is "two hundred twenty-one billion, two hundred one million, five hundred thirty thousand, four hundred twenty-four".