20021100001101 has 16 divisors (see below), whose sum is σ = 29695258437120. Its totient is φ = 13331933704800.

The previous prime is 20021100001037. The next prime is 20021100001127. The reversal of 20021100001101 is 10110000112002.

It is a happy number.

It is not a de Polignac number, because 20021100001101 - 2⁶ = 20021100001037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100001901) 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 15 ways as a sum of consecutive naturals, for example, 429595600 + ... + 429642201.

It is an arithmetic number, because the mean of its divisors is an integer number (1855953652320).

Almost surely, 2^{20021100001101} is an apocalyptic number.

It is an amenable number.

20021100001101 is a deficient number, since it is larger than the sum of its proper divisors (9674158436019).

20021100001101 is an equidigital number, since it uses as much as digits as its factorization.

20021100001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859238673 (or 859238667 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20021100001101 its reverse (10110000112002), we get a palindrome (30131100113103).

The spelling of 20021100001101 in words is "twenty trillion, twenty-one billion, one hundred million, one thousand, one hundred one".