221964098228 has 6 divisors (see below), whose sum is σ = 388437171906. Its totient is φ = 110982049112.

The previous prime is 221964098173. The next prime is 221964098233. The reversal of 221964098228 is 822890469122.

It can be written as a sum of positive squares in only one way, i.e., 203471362084 + 18492736144 = 451078^2 + 135988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221964098228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27745512275 + ... + 27745512282.

It is an arithmetic number, because the mean of its divisors is an integer number (64739528651).

Almost surely, 2^221964098228 is an apocalyptic number.

It is an amenable number.

221964098228 is a deficient number, since it is larger than the sum of its proper divisors (166473073678).

221964098228 is a wasteful number, since it uses less digits than its factorization.

221964098228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55491024561 (or 55491024559 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 221964098228 in words is "two hundred twenty-one billion, nine hundred sixty-four million, ninety-eight thousand, two hundred twenty-eight".