221120236228 has 24 divisors (see below), whose sum is σ = 405371030400. Its totient is φ = 105396459168.

The previous prime is 221120236217. The next prime is 221120236229. The reversal of 221120236228 is 822632021122.

It is a self number, because there is not a number n which added to its sum of digits gives 221120236228.

It is not an unprimeable number, because it can be changed into a prime (221120236229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12055450 + ... + 12073777.

It is an arithmetic number, because the mean of its divisors is an integer number (16890459600).

Almost surely, 2^221120236228 is an apocalyptic number.

It is an amenable number.

221120236228 is a deficient number, since it is larger than the sum of its proper divisors (184250794172).

221120236228 is a wasteful number, since it uses less digits than its factorization.

221120236228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24129339 (or 24129337 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 221120236228 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred thirty-six thousand, two hundred twenty-eight".