20001101020101 has 32 divisors (see below), whose sum is σ = 29937603696000. Its totient is φ = 13196220986880.

The previous prime is 20001101020097. The next prime is 20001101020123. The reversal of 20001101020101 is 10102010110002.

It is a happy number.

It is not a de Polignac number, because 20001101020101 - 2² = 20001101020097 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 (20001101021101) 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 31 ways as a sum of consecutive naturals, for example, 112263471 + ... + 112441491.

It is an arithmetic number, because the mean of its divisors is an integer number (935550115500).

Almost surely, 2^{20001101020101} is an apocalyptic number.

It is an amenable number.

20001101020101 is a deficient number, since it is larger than the sum of its proper divisors (9936502675899).

20001101020101 is a wasteful number, since it uses less digits than its factorization.

20001101020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221026 (or 221020 counting only the distinct ones).

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

Adding to 20001101020101 its reverse (10102010110002), we get a palindrome (30103111130103).

The spelling of 20001101020101 in words is "twenty trillion, one billion, one hundred one million, twenty thousand, one hundred one".