221120100122 has 16 divisors (see below), whose sum is σ = 336034381032. Its totient is φ = 109115635200.

The previous prime is 221120100119. The next prime is 221120100127. The reversal of 221120100122 is 221001021122.

It can be written as a sum of positive squares in 4 ways, for example, as 216782428801 + 4337671321 = 465599^2 + 65861^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221120100097 and 221120100106.

It is not an unprimeable number, because it can be changed into a prime (221120100127) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1685423 + ... + 1811874.

Almost surely, 2^221120100122 is an apocalyptic number.

221120100122 is a deficient number, since it is larger than the sum of its proper divisors (114914280910).

221120100122 is a wasteful number, since it uses less digits than its factorization.

221120100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497713.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221120100122 its reverse (221001021122), we get a palindrome (442121121244).

The spelling of 221120100122 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred thousand, one hundred twenty-two".