20110021200001 has 4 divisors (see below), whose sum is σ = 20110032880132. Its totient is φ = 20110009519872.

The previous prime is 20110021199969. The next prime is 20110021200007. The reversal of 20110021200001 is 10000212001102.

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 8502706083600 + 11607315116401 = 2915940^2 + 3406951^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110021200001 - 2⁵ = 20110021199969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110021200007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691720 + ... + 6889513.

It is an arithmetic number, because the mean of its divisors is an integer number (5027508220033).

Almost surely, 2^{20110021200001} is an apocalyptic number.

It is an amenable number.

20110021200001 is a deficient number, since it is larger than the sum of its proper divisors (11680131).

20110021200001 is an equidigital number, since it uses as much as digits as its factorization.

20110021200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11680130.

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

Adding to 20110021200001 its reverse (10000212001102), we get a palindrome (30110233201103).

The spelling of 20110021200001 in words is "twenty trillion, one hundred ten billion, twenty-one million, two hundred thousand, one".