20013120211 has 4 divisors (see below), whose sum is σ = 22872137392. Its totient is φ = 17154103032.

The previous prime is 20013120209. The next prime is 20013120233. The reversal of 20013120211 is 11202131002.

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

It is a cyclic number.

It is not a de Polignac number, because 20013120211 - 2¹ = 20013120209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013120191 and 20013120200.

It is not an unprimeable number, because it can be changed into a prime (20013120251) 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, 1429508580 + ... + 1429508593.

It is an arithmetic number, because the mean of its divisors is an integer number (5718034348).

Almost surely, 2^20013120211 is an apocalyptic number.

20013120211 is a deficient number, since it is larger than the sum of its proper divisors (2859017181).

20013120211 is an equidigital number, since it uses as much as digits as its factorization.

20013120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859017180.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20013120211 its reverse (11202131002), we get a palindrome (31215251213).

The spelling of 20013120211 in words is "twenty billion, thirteen million, one hundred twenty thousand, two hundred eleven".