221301213224 has 64 divisors (see below), whose sum is σ = 510912541440. Its totient is φ = 87510458880.

The previous prime is 221301213209. The next prime is 221301213257. The reversal of 221301213224 is 422312103122.

It is a self number, because there is not a number n which added to its sum of digits gives 221301213224.

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, 1678589 + ... + 1805619.

It is an arithmetic number, because the mean of its divisors is an integer number (7983008460).

Almost surely, 2^221301213224 is an apocalyptic number.

It is an amenable number.

221301213224 is an abundant number, since it is smaller than the sum of its proper divisors (289611328216).

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

221301213224 is a wasteful number, since it uses less digits than its factorization.

221301213224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129450 (or 129446 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221301213224 its reverse (422312103122), we get a palindrome (643613316346).

The spelling of 221301213224 in words is "two hundred twenty-one billion, three hundred one million, two hundred thirteen thousand, two hundred twenty-four".