22221221200001 has 4 divisors (see below), whose sum is σ = 22221231833904. Its totient is φ = 22221210566100.

The previous prime is 22221221199959. The next prime is 22221221200019. The reversal of 22221221200001 is 10000212212222.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22221221200001 - 2¹⁴ = 22221221183617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221221200051) 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, 1030655 + ... + 6745716.

It is an arithmetic number, because the mean of its divisors is an integer number (5555307958476).

Almost surely, 2^{22221221200001} is an apocalyptic number.

It is an amenable number.

22221221200001 is a deficient number, since it is larger than the sum of its proper divisors (10633903).

22221221200001 is an equidigital number, since it uses as much as digits as its factorization.

22221221200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633902.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22221221200001 its reverse (10000212212222), we get a palindrome (32221433412223).

The spelling of 22221221200001 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, one".