20010100101 has 32 divisors (see below), whose sum is σ = 27354983040. Its totient is φ = 13006848000.

The previous prime is 20010100093. The next prime is 20010100111. The reversal of 20010100101 is 10100101002.

It is not a de Polignac number, because 20010100101 - 2³ = 20010100093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010100111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12497701 + ... + 12499301.

It is an arithmetic number, because the mean of its divisors is an integer number (854843220).

Almost surely, 2^20010100101 is an apocalyptic number.

It is an amenable number.

20010100101 is a deficient number, since it is larger than the sum of its proper divisors (7344882939).

20010100101 is a wasteful number, since it uses less digits than its factorization.

20010100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 20010100101 its reverse (10100101002), we get a palindrome (30110201103).

Subtracting from 20010100101 its reverse (10100101002), we obtain a palindrome (9909999099).

The spelling of 20010100101 in words is "twenty billion, ten million, one hundred thousand, one hundred one".