21002021202022 has 8 divisors (see below), whose sum is σ = 36003464917776. Its totient is φ = 9000866229432.

The previous prime is 21002021202017. The next prime is 21002021202023. The reversal of 21002021202022 is 22020212020012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21002021202022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002021201987 and 21002021202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002021202023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750072185773 + ... + 750072185800.

It is an arithmetic number, because the mean of its divisors is an integer number (4500433114722).

Almost surely, 2^{21002021202022} is an apocalyptic number.

21002021202022 is a deficient number, since it is larger than the sum of its proper divisors (15001443715754).

21002021202022 is a wasteful number, since it uses less digits than its factorization.

21002021202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500144371582.

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

Adding to 21002021202022 its reverse (22020212020012), we get a palindrome (43022233222034).

The spelling of 21002021202022 in words is "twenty-one trillion, two billion, twenty-one million, two hundred two thousand, twenty-two".