221121022304 has 72 divisors (see below), whose sum is σ = 538737257520. Its totient is φ = 87476433408.

The previous prime is 221121022271. The next prime is 221121022319. The reversal of 221121022304 is 403220121122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2882699 + ... + 2958410.

It is an arithmetic number, because the mean of its divisors is an integer number (7482461910).

Almost surely, 2^221121022304 is an apocalyptic number.

It is an amenable number.

221121022304 is an abundant number, since it is smaller than the sum of its proper divisors (317616235216).

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

221121022304 is a wasteful number, since it uses less digits than its factorization.

221121022304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841152 (or 5841131 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221121022304 its reverse (403220121122), we get a palindrome (624341143426).

The spelling of 221121022304 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, three hundred four".