22121122221001 has 8 divisors (see below), whose sum is σ = 23296679003520. Its totient is φ = 20946694157712.

The previous prime is 22121122220971. The next prime is 22121122221017. The reversal of 22121122221001 is 10012222112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22121122221001 - 2⁹ = 22121122220489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121122221001.

It is not an unprimeable number, because it can be changed into a prime (22121122221041) 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 7 ways as a sum of consecutive naturals, for example, 282139570 + ... + 282217963.

It is an arithmetic number, because the mean of its divisors is an integer number (2912084875440).

Almost surely, 2^{22121122221001} is an apocalyptic number.

It is an amenable number.

22121122221001 is a deficient number, since it is larger than the sum of its proper divisors (1175556782519).

22121122221001 is a wasteful number, since it uses less digits than its factorization.

22121122221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564359615.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22121122221001 its reverse (10012222112122), we get a palindrome (32133344333123).

The spelling of 22121122221001 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one".