21021201020022 has 16 divisors (see below), whose sum is σ = 48048459474432. Its totient is φ = 6006057434280.

The previous prime is 21021201020021. The next prime is 21021201020077. The reversal of 21021201020022 is 22002010212012.

It is a junction number, because it is equal to n+sod(n) for n = 21021201019983 and 21021201020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021201020021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250252393054 + ... + 250252393137.

It is an arithmetic number, because the mean of its divisors is an integer number (3003028717152).

Almost surely, 2^{21021201020022} is an apocalyptic number.

21021201020022 is an abundant number, since it is smaller than the sum of its proper divisors (27027258454410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021201020022 is a wasteful number, since it uses less digits than its factorization.

21021201020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500504786203.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21021201020022 its reverse (22002010212012), we get a palindrome (43023211232034).

The spelling of 21021201020022 in words is "twenty-one trillion, twenty-one billion, two hundred one million, twenty thousand, twenty-two".