22021002002 has 4 divisors (see below), whose sum is σ = 33031503006. Its totient is φ = 11010501000.

The previous prime is 22021002001. The next prime is 22021002077. The reversal of 22021002002 is 20020012022.

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., 20229088441 + 1791913561 = 142229^2 + 42331^2 .

It is not an unprimeable number, because it can be changed into a prime (22021002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505250499 + ... + 5505250502.

Almost surely, 2^22021002002 is an apocalyptic number.

22021002002 is a deficient number, since it is larger than the sum of its proper divisors (11010501004).

22021002002 is a wasteful number, since it uses less digits than its factorization.

22021002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010501003.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22021002002 its reverse (20020012022), we get a palindrome (42041014024).

The spelling of 22021002002 in words is "twenty-two billion, twenty-one million, two thousand, two".