20001000101 has 4 divisors (see below), whose sum is σ = 20195184672. Its totient is φ = 19806815532.

The previous prime is 20001000083. The next prime is 20001000109. The reversal of 20001000101 is 10100010002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001000101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001000109) 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, 97092131 + ... + 97092336.

It is an arithmetic number, because the mean of its divisors is an integer number (5048796168).

Almost surely, 2^20001000101 is an apocalyptic number.

It is an amenable number.

20001000101 is a deficient number, since it is larger than the sum of its proper divisors (194184571).

20001000101 is a wasteful number, since it uses less digits than its factorization.

20001000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194184570.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 20001000101 its reverse (10100010002), we get a palindrome (30101010103).

Subtracting from 20001000101 its reverse (10100010002), we obtain a palindrome (9900990099).

The spelling of 20001000101 in words is "twenty billion, one million, one hundred one", and thus it is an aban number.