20000021100101 has 64 divisors (see below), whose sum is σ = 25932182814720. Its totient is φ = 15024091610880.

The previous prime is 20000021100079. The next prime is 20000021100109. The reversal of 20000021100101 is 10100112000002.

It is not a de Polignac number, because 20000021100101 - 2¹⁸ = 20000020837957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000021100109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 155170655 + ... + 155299491.

It is an arithmetic number, because the mean of its divisors is an integer number (405190356480).

Almost surely, 2^{20000021100101} is an apocalyptic number.

It is an amenable number.

20000021100101 is a deficient number, since it is larger than the sum of its proper divisors (5932161714619).

20000021100101 is a wasteful number, since it uses less digits than its factorization.

20000021100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130554.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20000021100101 its reverse (10100112000002), we get a palindrome (30100133100103).

The spelling of 20000021100101 in words is "twenty trillion, twenty-one million, one hundred thousand, one hundred one".