22121200101001 has 4 divisors (see below), whose sum is σ = 22127177192004. Its totient is φ = 22115223010000.

The previous prime is 22121200100999. The next prime is 22121200101059. The reversal of 22121200101001 is 10010100212122.

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 12520026873225 + 9601173227776 = 3538365^2 + 3098576^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121200101001 - 2¹ = 22121200100999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121200101061) 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, 2988539950 + ... + 2988547351.

It is an arithmetic number, because the mean of its divisors is an integer number (5531794298001).

Almost surely, 2^{22121200101001} is an apocalyptic number.

It is an amenable number.

22121200101001 is a deficient number, since it is larger than the sum of its proper divisors (5977091003).

22121200101001 is an equidigital number, since it uses as much as digits as its factorization.

22121200101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5977091002.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22121200101001 its reverse (10010100212122), we get a palindrome (32131300313123).

The spelling of 22121200101001 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred million, one hundred one thousand, one".