22221022202221 has 8 divisors (see below), whose sum is σ = 22233326843000. Its totient is φ = 22208720832000.

The previous prime is 22221022202219. The next prime is 22221022202293. The reversal of 22221022202221 is 12220222012222.

It can be written as a sum of positive squares in 4 ways, for example, as 9610434004900 + 12610588197321 = 3100070^2 + 3551139^2 .

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 22221022202221 - 2¹ = 22221022202219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221022202192 and 22221022202201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221022202021) 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, 12837685 + ... + 14465413.

It is an arithmetic number, because the mean of its divisors is an integer number (2779165855375).

Almost surely, 2^{22221022202221} is an apocalyptic number.

It is an amenable number.

22221022202221 is a deficient number, since it is larger than the sum of its proper divisors (12304640779).

22221022202221 is a wasteful number, since it uses less digits than its factorization.

22221022202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635279.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22221022202221 its reverse (12220222012222), we get a palindrome (34441244214443).

The spelling of 22221022202221 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-two million, two hundred two thousand, two hundred twenty-one".