22210221202021 has 8 divisors (see below), whose sum is σ = 22216453976664. Its totient is φ = 22203989176320.

The previous prime is 22210221202007. The next prime is 22210221202051. The reversal of 22210221202021 is 12020212201222.

It can be written as a sum of positive squares in 4 ways, for example, as 412658488225 + 21797562713796 = 642385^2 + 4668786^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22210221202021 - 2²⁵ = 22210187647589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22210221202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210221202051) 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, 62000595 + ... + 62357791.

It is an arithmetic number, because the mean of its divisors is an integer number (2777056747083).

Almost surely, 2^{22210221202021} is an apocalyptic number.

It is an amenable number.

22210221202021 is a deficient number, since it is larger than the sum of its proper divisors (6232774643).

22210221202021 is a wasteful number, since it uses less digits than its factorization.

22210221202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374471.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22210221202021 its reverse (12020212201222), we get a palindrome (34230433403243).

The spelling of 22210221202021 in words is "twenty-two trillion, two hundred ten billion, two hundred twenty-one million, two hundred two thousand, twenty-one".