22122001220221 has 4 divisors (see below), whose sum is σ = 25282287108832. Its totient is φ = 18961715331612.

The previous prime is 22122001220213. The next prime is 22122001220351. The reversal of 22122001220221 is 12202210022122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22122001220221 - 2³ = 22122001220213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122091220221) 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, 1580142944295 + ... + 1580142944308.

It is an arithmetic number, because the mean of its divisors is an integer number (6320571777208).

Almost surely, 2^{22122001220221} is an apocalyptic number.

It is an amenable number.

22122001220221 is a deficient number, since it is larger than the sum of its proper divisors (3160285888611).

22122001220221 is an equidigital number, since it uses as much as digits as its factorization.

22122001220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160285888610.

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

Adding to 22122001220221 its reverse (12202210022122), we get a palindrome (34324211242343).

The spelling of 22122001220221 in words is "twenty-two trillion, one hundred twenty-two billion, one million, two hundred twenty thousand, two hundred twenty-one".