212221221002002 has 4 divisors (see below), whose sum is σ = 318331831503006. Its totient is φ = 106110610501000.

The previous prime is 212221221001991. The next prime is 212221221002017. The reversal of 212221221002002 is 200200122122212.

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., 114025428836361 + 98195792165641 = 10678269^2 + 9909379^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 53055305250499 + ... + 53055305250502.

Almost surely, 2^{212221221002002} is an apocalyptic number.

212221221002002 is a deficient number, since it is larger than the sum of its proper divisors (106110610501004).

212221221002002 is a wasteful number, since it uses less digits than its factorization.

212221221002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106110610501003.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212221221002002 its reverse (200200122122212), we get a palindrome (412421343124214).

The spelling of 212221221002002 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, two thousand, two".