20001120010021 has 8 divisors (see below), whose sum is σ = 20692232294400. Its totient is φ = 19310102291760.

The previous prime is 20001120010007. The next prime is 20001120010051. The reversal of 20001120010021 is 12001002110002.

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 20001120010021 - 2²¹ = 20001117912869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001120010051) 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, 23211081 + ... + 24057358.

It is an arithmetic number, because the mean of its divisors is an integer number (2586529036800).

Almost surely, 2^{20001120010021} is an apocalyptic number.

It is an amenable number.

20001120010021 is a deficient number, since it is larger than the sum of its proper divisors (691112284379).

20001120010021 is a wasteful number, since it uses less digits than its factorization.

20001120010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47283059.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001120010021 its reverse (12001002110002), we get a palindrome (32002122120023).

The spelling of 20001120010021 in words is "twenty trillion, one billion, one hundred twenty million, ten thousand, twenty-one".