20211200001021 has 8 divisors (see below), whose sum is σ = 26948287543744. Its totient is φ = 13474122896160.

The previous prime is 20211200001017. The next prime is 20211200001029. The reversal of 20211200001021 is 12010000211202.

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

It is not a de Polignac number, because 20211200001021 - 2² = 20211200001017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211200000988 and 20211200001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211200001029) 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 7 ways as a sum of consecutive naturals, for example, 5582976 + ... + 8461206.

It is an arithmetic number, because the mean of its divisors is an integer number (3368535942968).

Almost surely, 2^{20211200001021} is an apocalyptic number.

It is an amenable number.

20211200001021 is a deficient number, since it is larger than the sum of its proper divisors (6737087542723).

20211200001021 is a wasteful number, since it uses less digits than its factorization.

20211200001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218931.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211200001021 its reverse (12010000211202), we get a palindrome (32221200212223).

The spelling of 20211200001021 in words is "twenty trillion, two hundred eleven billion, two hundred million, one thousand, twenty-one".