221223100122 has 24 divisors (see below), whose sum is σ = 492271224276. Its totient is φ = 71748032256.

The previous prime is 221223100117. The next prime is 221223100169. The reversal of 221223100122 is 221001322122.

221223100122 is a `hidden beast` number, since 221 + 223 + 100 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 214118127441 + 7104972681 = 462729^2 + 84291^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221223100095 and 221223100104.

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, 166082743 + ... + 166084074.

Almost surely, 2^221223100122 is an apocalyptic number.

221223100122 is an abundant number, since it is smaller than the sum of its proper divisors (271048124154).

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

221223100122 is a wasteful number, since it uses less digits than its factorization.

221223100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332166862 (or 332166859 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221223100122 its reverse (221001322122), we get a palindrome (442224422244).

The spelling of 221223100122 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred thousand, one hundred twenty-two".