22002002100121 has 4 divisors (see below), whose sum is σ = 22002013440100. Its totient is φ = 22001990760144.

The previous prime is 22002002100047. The next prime is 22002002100157. The reversal of 22002002100121 is 12100120020022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20392810905600 + 1609191194521 = 4515840^2 + 1268539^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002002100121 - 2¹¹ = 22002002098073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22002002100521) 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, 1943106 + ... + 6912283.

It is an arithmetic number, because the mean of its divisors is an integer number (5500503360025).

Almost surely, 2^{22002002100121} is an apocalyptic number.

It is an amenable number.

22002002100121 is a deficient number, since it is larger than the sum of its proper divisors (11339979).

22002002100121 is an equidigital number, since it uses as much as digits as its factorization.

22002002100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11339978.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22002002100121 its reverse (12100120020022), we get a palindrome (34102122120143).

The spelling of 22002002100121 in words is "twenty-two trillion, two billion, two million, one hundred thousand, one hundred twenty-one".