22121221100001 has 4 divisors (see below), whose sum is σ = 29494961466672. Its totient is φ = 14747480733332.

The previous prime is 22121221099931. The next prime is 22121221100029. The reversal of 22121221100001 is 10000112212122.

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 22121221100001 - 2¹¹ = 22121221097953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121221100401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3686870183331 + ... + 3686870183336.

It is an arithmetic number, because the mean of its divisors is an integer number (7373740366668).

Almost surely, 2^{22121221100001} is an apocalyptic number.

It is an amenable number.

22121221100001 is a deficient number, since it is larger than the sum of its proper divisors (7373740366671).

22121221100001 is an equidigital number, since it uses as much as digits as its factorization.

22121221100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373740366670.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121221100001 its reverse (10000112212122), we get a palindrome (32121333312123).

The spelling of 22121221100001 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, one".