20033123101 has 4 divisors (see below), whose sum is σ = 20034137500. Its totient is φ = 20032108704.

The previous prime is 20033123057. The next prime is 20033123147. The reversal of 20033123101 is 10132133002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11761402500 + 8271720601 = 108450^2 + 90949^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033123101 - 2¹³ = 20033114909 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 (20033123501) 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, 476976 + ... + 517273.

It is an arithmetic number, because the mean of its divisors is an integer number (5008534375).

Almost surely, 2^20033123101 is an apocalyptic number.

It is an amenable number.

20033123101 is a deficient number, since it is larger than the sum of its proper divisors (1014399).

20033123101 is an equidigital number, since it uses as much as digits as its factorization.

20033123101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014398.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20033123101 its reverse (10132133002), we get a palindrome (30165256103).

Subtracting from 20033123101 its reverse (10132133002), we obtain a palindrome (9900990099).

The spelling of 20033123101 in words is "twenty billion, thirty-three million, one hundred twenty-three thousand, one hundred one".