221210403424 has 48 divisors (see below), whose sum is σ = 473589008928. Its totient is φ = 101285517312.

The previous prime is 221210403419. The next prime is 221210403451. The reversal of 221210403424 is 424304012122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5474964 + ... + 5515219.

It is an arithmetic number, because the mean of its divisors is an integer number (9866437686).

Almost surely, 2^221210403424 is an apocalyptic number.

It is an amenable number.

221210403424 is an abundant number, since it is smaller than the sum of its proper divisors (252378605504).

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

221210403424 is a wasteful number, since it uses less digits than its factorization.

221210403424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990247 (or 10990239 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 221210403424 its reverse (424304012122), we get a palindrome (645514415546).

The spelling of 221210403424 in words is "two hundred twenty-one billion, two hundred ten million, four hundred three thousand, four hundred twenty-four".