20001002122001 has 8 divisors (see below), whose sum is σ = 20055202737024. Its totient is φ = 19946865088080.

The previous prime is 20001002121967. The next prime is 20001002122007. The reversal of 20001002122001 is 10022120010002.

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 a de Polignac number, because none of the positive numbers 2^k-20001002122001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001002122007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15265241 + ... + 16523606.

It is an arithmetic number, because the mean of its divisors is an integer number (2506900342128).

Almost surely, 2^{20001002122001} is an apocalyptic number.

It is an amenable number.

20001002122001 is a deficient number, since it is larger than the sum of its proper divisors (54200615023).

20001002122001 is a wasteful number, since it uses less digits than its factorization.

20001002122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31790551.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001002122001 its reverse (10022120010002), we get a palindrome (30023122132003).

The spelling of 20001002122001 in words is "twenty trillion, one billion, two million, one hundred twenty-two thousand, one".