20002222102021 has 4 divisors (see below), whose sum is σ = 20330127382444. Its totient is φ = 19674316821600.

The previous prime is 20002222102003. The next prime is 20002222102043. The reversal of 20002222102021 is 12020122220002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11586194822500 + 8416027279521 = 3403850^2 + 2901039^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002222102021 - 2⁹ = 20002222101509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002222101986 and 20002222102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002222102081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163952640120 + ... + 163952640241.

It is an arithmetic number, because the mean of its divisors is an integer number (5082531845611).

Almost surely, 2^{20002222102021} is an apocalyptic number.

It is an amenable number.

20002222102021 is a deficient number, since it is larger than the sum of its proper divisors (327905280423).

20002222102021 is an equidigital number, since it uses as much as digits as its factorization.

20002222102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327905280422.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20002222102021 its reverse (12020122220002), we get a palindrome (32022344322023).

The spelling of 20002222102021 in words is "twenty trillion, two billion, two hundred twenty-two million, one hundred two thousand, twenty-one".