22201222002221 has 4 divisors (see below), whose sum is σ = 22201696870332. Its totient is φ = 22200747134112.

The previous prime is 22201222002199. The next prime is 22201222002299. The reversal of 22201222002221 is 12220022210222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21296794374025 + 904427628196 = 4614845^2 + 951014^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201222002221 - 2¹⁸ = 22201221740077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201222002193 and 22201222002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201222032221) 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, 237363920 + ... + 237457433.

It is an arithmetic number, because the mean of its divisors is an integer number (5550424217583).

Almost surely, 2^{22201222002221} is an apocalyptic number.

It is an amenable number.

22201222002221 is a deficient number, since it is larger than the sum of its proper divisors (474868111).

22201222002221 is an equidigital number, since it uses as much as digits as its factorization.

22201222002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474868110.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22201222002221 its reverse (12220022210222), we get a palindrome (34421244212443).

The spelling of 22201222002221 in words is "twenty-two trillion, two hundred one billion, two hundred twenty-two million, two thousand, two hundred twenty-one".