20002021220002 has 4 divisors (see below), whose sum is σ = 30003031830006. Its totient is φ = 10001010610000.

The previous prime is 20002021219979. The next prime is 20002021220003. The reversal of 20002021220002 is 20002212020002.

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., 19375059727521 + 626961492481 = 4401711^2 + 791809^2 .

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 not an unprimeable number, because it can be changed into a prime (20002021220003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000505304999 + ... + 5000505305002.

Almost surely, 2^{20002021220002} is an apocalyptic number.

20002021220002 is a deficient number, since it is larger than the sum of its proper divisors (10001010610004).

20002021220002 is a wasteful number, since it uses less digits than its factorization.

20002021220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001010610003.

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

Adding to 20002021220002 its reverse (20002212020002), we get a palindrome (40004233240004).

The spelling of 20002021220002 in words is "twenty trillion, two billion, twenty-one million, two hundred twenty thousand, two".