221123111204 has 6 divisors (see below), whose sum is σ = 386965444614. Its totient is φ = 110561555600.

The previous prime is 221123111179. The next prime is 221123111243. The reversal of 221123111204 is 402111321122.

It can be written as a sum of positive squares in only one way, i.e., 165728781604 + 55394329600 = 407098^2 + 235360^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640388897 + ... + 27640388904.

It is an arithmetic number, because the mean of its divisors is an integer number (64494240769).

Almost surely, 2^221123111204 is an apocalyptic number.

It is an amenable number.

221123111204 is a deficient number, since it is larger than the sum of its proper divisors (165842333410).

221123111204 is a wasteful number, since it uses less digits than its factorization.

221123111204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280777805 (or 55280777803 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221123111204 its reverse (402111321122), we get a palindrome (623234432326).

The spelling of 221123111204 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred eleven thousand, two hundred four".