2221100122 has 4 divisors (see below), whose sum is σ = 3331650186. Its totient is φ = 1110550060.

The previous prime is 2221100081. The next prime is 2221100129. The reversal of 2221100122 is 2210011222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2210011222 = 2 ⋅1105005611.

It can be written as a sum of positive squares in only one way, i.e., 1982119441 + 238980681 = 44521^2 + 15459^2 .

It is not an unprimeable number, because it can be changed into a prime (2221100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555275029 + ... + 555275032.

Almost surely, 2^2221100122 is an apocalyptic number.

2221100122 is a deficient number, since it is larger than the sum of its proper divisors (1110550064).

2221100122 is a wasteful number, since it uses less digits than its factorization.

2221100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110550063.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2221100122 is about 47128.5489061567. The cubic root of 2221100122 is about 1304.7361997174.

Adding to 2221100122 its reverse (2210011222), we get a palindrome (4431111344).

Subtracting from 2221100122 its reverse (2210011222), we obtain a square (11088900 = 3330²).

It can be divided in two parts, 2221100 and 122, that added together give a palindrome (2221222).

The spelling of 2221100122 in words is "two billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-two".