20001001101 has 4 divisors (see below), whose sum is σ = 26668001472. Its totient is φ = 13334000732.

The previous prime is 20001001081. The next prime is 20001001157. The reversal of 20001001101 is 10110010002.

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 not a de Polignac number, because 20001001101 - 2¹³ = 20000992909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001001171) 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, 3333500181 + ... + 3333500186.

It is an arithmetic number, because the mean of its divisors is an integer number (6667000368).

Almost surely, 2^20001001101 is an apocalyptic number.

It is an amenable number.

20001001101 is a deficient number, since it is larger than the sum of its proper divisors (6667000371).

20001001101 is an equidigital number, since it uses as much as digits as its factorization.

20001001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667000370.

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

Adding to 20001001101 its reverse (10110010002), we get a palindrome (30111011103).

The spelling of 20001001101 in words is "twenty billion, one million, one thousand, one hundred one".