20011320101 has 4 divisors (see below), whose sum is σ = 20011605600. Its totient is φ = 20011034604.

The previous prime is 20011320089. The next prime is 20011320107. The reversal of 20011320101 is 10102311002.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20011320101 - 2⁶ = 20011320037 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 (20011320107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42680 + ... + 204558.

It is an arithmetic number, because the mean of its divisors is an integer number (5002901400).

Almost surely, 2^20011320101 is an apocalyptic number.

It is an amenable number.

20011320101 is a deficient number, since it is larger than the sum of its proper divisors (285499).

20011320101 is a wasteful number, since it uses less digits than its factorization.

20011320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285498.

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

Adding to 20011320101 its reverse (10102311002), we get a palindrome (30113631103).

Subtracting from 20011320101 its reverse (10102311002), we obtain a palindrome (9909009099).

The spelling of 20011320101 in words is "twenty billion, eleven million, three hundred twenty thousand, one hundred one".