20023101101 has 4 divisors (see below), whose sum is σ = 20023386972. Its totient is φ = 20022815232.

The previous prime is 20023101089. The next prime is 20023101149. The reversal of 20023101101 is 10110132002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9019300900 + 11003800201 = 94970^2 + 104899^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023101101 - 2²⁶ = 19955992237 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 (20023101181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41195 + ... + 204311.

It is an arithmetic number, because the mean of its divisors is an integer number (5005846743).

Almost surely, 2^20023101101 is an apocalyptic number.

It is an amenable number.

20023101101 is a deficient number, since it is larger than the sum of its proper divisors (285871).

20023101101 is a wasteful number, since it uses less digits than its factorization.

20023101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285870.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20023101101 its reverse (10110132002), we get a palindrome (30133233103).

The spelling of 20023101101 in words is "twenty billion, twenty-three million, one hundred one thousand, one hundred one".