22221002002 has 4 divisors (see below), whose sum is σ = 33331503006. Its totient is φ = 11110501000.

The previous prime is 22221001997. The next prime is 22221002047. The reversal of 22221002002 is 20020012222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19695034921 + 2525967081 = 140339^2 + 50259^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555250499 + ... + 5555250502.

Almost surely, 2^22221002002 is an apocalyptic number.

22221002002 is a deficient number, since it is larger than the sum of its proper divisors (11110501004).

22221002002 is a wasteful number, since it uses less digits than its factorization.

22221002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110501003.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22221002002 its reverse (20020012222), we get a palindrome (42241014224).

The spelling of 22221002002 in words is "twenty-two billion, two hundred twenty-one million, two thousand, two".