21011022002022 has 64 divisors (see below), whose sum is σ = 45707181811200. Its totient is φ = 6400298859264.

The previous prime is 21011022001999. The next prime is 21011022002077. The reversal of 21011022002022 is 22020022011012.

It is a junction number, because it is equal to n+sod(n) for n = 21011022001992 and 21011022002010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27330133 + ... + 28088399.

It is an arithmetic number, because the mean of its divisors is an integer number (714174715800).

Almost surely, 2^{21011022002022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21011022002022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22853590905600).

21011022002022 is an abundant number, since it is smaller than the sum of its proper divisors (24696159809178).

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

21011022002022 is a wasteful number, since it uses less digits than its factorization.

21011022002022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761837.

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

Adding to 21011022002022 its reverse (22020022011012), we get a palindrome (43031044013034).

The spelling of 21011022002022 in words is "twenty-one trillion, eleven billion, twenty-two million, two thousand, twenty-two".