20002121122201 has 8 divisors (see below), whose sum is σ = 20004430875264. Its totient is φ = 19999811539920.

The previous prime is 20002121122169. The next prime is 20002121122223. The reversal of 20002121122201 is 10222112120002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20002121122201 - 2⁵ = 20002121122169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002121152201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490383930 + ... + 490424716.

It is an arithmetic number, because the mean of its divisors is an integer number (2500553859408).

Almost surely, 2^{20002121122201} is an apocalyptic number.

It is an amenable number.

20002121122201 is a deficient number, since it is larger than the sum of its proper divisors (2309753063).

20002121122201 is a wasteful number, since it uses less digits than its factorization.

20002121122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85391.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20002121122201 its reverse (10222112120002), we get a palindrome (30224233242203).

The spelling of 20002121122201 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred one".