22102101020021 has 24 divisors (see below), whose sum is σ = 25853681007000. Its totient is φ = 18814893870080.

The previous prime is 22102101019993. The next prime is 22102101020071. The reversal of 22102101020021 is 12002010120122.

It can be written as a sum of positive squares in 4 ways, for example, as 18640901235121 + 3461199784900 = 4317511^2 + 1860430^2 .

It is not a de Polignac number, because 22102101020021 - 2¹⁴ = 22102101003637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22102101019978 and 22102101020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102101020071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26865896 + ... + 27676353.

It is an arithmetic number, because the mean of its divisors is an integer number (1077236708625).

Almost surely, 2^{22102101020021} is an apocalyptic number.

It is an amenable number.

22102101020021 is a deficient number, since it is larger than the sum of its proper divisors (3751579986979).

22102101020021 is a wasteful number, since it uses less digits than its factorization.

22102101020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54542485 (or 54542474 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22102101020021 its reverse (12002010120122), we get a palindrome (34104111140143).

The spelling of 22102101020021 in words is "twenty-two trillion, one hundred two billion, one hundred one million, twenty thousand, twenty-one".